From owner-chemistry@ccl.net Fri Jan 26 09:02:43 1996
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From: brock@chemie.uni-hamburg.de (Mathias Brock)
Message-Id: <9601261349.AA25115@ocserv.chemie.uni-hamburg.de>
Subject: orbital density viewers
To: chemistry@ccl.net
Date: Fri, 26 Jan 1996 14:49:06 +0100 (NFT)
Cc: brock@chemie.uni-hamburg.de (Mathias Brock)
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Hallo netters,

I investigated the document about MO visualizers and found a lack
of electronic structure viewers. Most often just the molecular
structures were visualized.
The few suitable programs were used on specific hardware platforms
thus PC's-based programs were scarce.
In connection to MS-Windows-based text-processing I'm looking
for a program generating electronic density graphics from G9x-output. 
It shall be great to have isosurfaces for planes through a molecules.
Anybody, who has found or writen programs doing this, should be free to mail
me about their experience. I'll summaries on the net.

Mathias Brock



From hey@mail2.nmri.nnmc.navy.mil  Mon Jan 29 13:57:29 1996
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Date: Mon, 29 Jan 1996 13:39:24 -0500
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To: chemistry@www.ccl.net
From: Jeff Hey <hey@mail2.nmri.nnmc.navy.mil>
Subject: AMBER query reply summary




Dear Fellow-CCL subscribers,

Firstly thanks to all who replied to my queries.
This email is a summary of the suggestions sent to me regarding the question
of AMBER bending parameters for saccharides.
I have not yet had time to view these references, but I will post them all
regardless.

The suggested references for AMBER bending parameters for saccharides are:

Woods, et al., J. Phys. Chem., 1995, 99, 3832-3846.
Glennon, et al., J. Comp. Chem., 1994, 15, 1019-1040.
Imberty, et al., Glycobiology, 1991, 1, 631-642. (for Sybyl)
Ha, et al., Carbohydrate Research, 1988, 180, 207.
(Thanks to Dr J Brown)
 Yajun Zheng et al., J. Comput. Chem. 1994, 15,1019-1040.
(Thanks to Yajun Zheng)
 Steve Homans, Biochem, 29, 9110-9118 (1990).
(Thanks separately to Jeff Dyason and Alan Arnold [hello to some fellow
Aussies!])

Also Kenny Lipkowitz (thanks!) wrote to tell me that Appendix I by Osawa and
Lipkowitz in "Reviews in Computational Chemistry", vol. 6, VCH Publishers,
1995 is entitled "Published Force Field Parameters", and should contain the
parameters that I need.

In addition to all the above information, I was told that there is an AMBER
web site, at  http://www.amber.ucsf.edu/amber/amber.html.
Thanks to Bill Ross and Soaring Bear for this information.

I think that is all-apologies to those that I have accidentally left out of
this summary!
Jeff
*******************************************************************
Dr Jeff Hey
Transfusion and Cryopreservation Research Program
NMRI, Building 29, Naval Medical Centre,
Bethesda, Maryland, 20889-5607.
Telephone: (301) 295 6378  FAX: (301) 295 6083
E-mail:  hey@mail2.nmri.nnmc.navy.mil
*******************************************************************



From mito@badoit.chem.nagoya-u.ac.jp  Fri Jan 26 03:52:21 1996
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Date: Fri, 26 Jan 1996 17:45:20 +0900
From: Masakatsu ITO <mito@badoit.chem.nagoya-u.ac.jp>
Message-Id: <199601260845.RAA13028@badoit.chem.nagoya-u.ac.jp>
To: chemistry@www.ccl.net
Subject: Any model Hamiltonian of polyene(C4H6,C6H8,C8H10)?



Dear CCLers,

  I'm interested in the photoisomerization dynamics of polyenes.
Does anyone know the literature concerning the model potential of
those and parametrization?
  Any hints or comments concerning this subject are 
welcomed. I will post the summary of the responses if there
would be any.

Masakatsu Ito, PhD student
Department of Structual Molecular Science
The Graduate University for Advanced Studies
Tel 81(Japan)-52-789-3656 Fax 81(Japan)-52-789-3551
E-mail mito@aqua.chem.nagoya-u.ac.jp
Web http://www.chem.nagoya-u.ac.jp/~mito/mito.html


From owner-chemistry@ccl.net  Fri Jan 26 10:22:25 1996
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Date: Fri, 26 Jan 1996 10:23:13 -0400
To: CHEMISTRY@ccl.net
From: jmiller@SANDCASTLE.COSC.BROCKU.CA (Jack Martin Miller)
Subject: Re:Semi-empirical programs for teaching



Below is a summary of responses I received in answer to my request for
advice on free or low cost semi-empirical programs for teaching purposes so
that students might have copies for their own computers. Information is in
the order recieved. My thanks, and that of my colleagues to all
respondents. One of my coleagues has ended up using MOPAC, another GAMES,
and several SPARTAN (currently on SGI, but the Mac version is awaited).

1.I don't know if this is what you are looking for, but we are about to
release MacSpartan for the PowerMac platforms.  Currently, you can acquire
information from our WEB site at http://www.wavefun.com.

MacSpartan is due to be released during the first quarter of 1996.
MacSpartan includes:

1. A Graphical User Interface, much like Spartan for UNIX systems, that
includes BUILDERS for:

A. Organic Molecules
B. Polypeptides
C. Transition States

2. Calculations using the following methodologies:

A. Molecular Mechanics (SYBYL)
B. Semi-Empirical (AM1)
C. Ab Initio Hartree-Fock (3-21G and 6-31G* basis sets)

3. Displays:

A. Structure
B. Molecular Orbitals, electron densities, electrostatic potentials C. Animation


MacSpartan will run on all PowerMac platforms with 16MB of RAM, preferably
with a 66MHZ processor or faster. All appropriate screens are supported,
but the minimum for practical use is 13" and ideal is 16"/17" or greater.
Obviously, the faster the machine, the better the performance--and your
8500 will more than do the job.

And...the academic price for MacSpartan is only $299!

If you have any further questions or are interested in acquiring
MacSpartan, please get in touch with me at the address below.

Thanks for your interest.



Jim Parisi
Marketing/Sales Coordinator

2. MNDO source code is available from the QCPE at Indiana University.  Also, it
is not semi-empirical, but I have a nice little version of an ordinary
Huckel (that is, pi systems only; energies in units of beta) program,
including parameters for heteroatoms, and an instruction manual.  I'd be
happy to make it available, free of course, on my ftp site.

Professor Ray Fort, Jr.             Voice:   (207)-581-1180
Department of Chemistry             FAX:     (207)-581-1191
University of Maine                 E-mail:  rcfort@maine.maine.edu
Orono ME 04469                               rfortjr@fort.umeche.maine.edu

3. I have two Macintosh HMO programs:

1) HMO written by Harry Haddon and John Farrell at Franklin and Marshall
College in Lancaster, PA. It is quite old now: 1985 version. I don not know
if it has been updated. A so-so program.

2) HMO written by Allan Wissner, Oncology and Immunology Section, Medical
Research Division, American Cyanamide Co., Lederle Labs, Pearl River, NY
10965. This program would be nicely suited to Chemistry seniors. It
displays the MOs graphically, which can be copied and included in text,
etc. It also has an implementation of the "omega" technique. This one was
*free* at the time!!!

I searched the net for HMO (got many Health Management Orgs. hits) and
Huckel + HMO and got no hits. Apparently these programs are not supported
on the net.

Hope this helps! GN

Gary Newton
Professor of Chemistry
University of Georgia
Chemistry Department
Athens, GA 30602  USA

Phone 706-542-1969
Fax 706-542-9454

email newton@sunchem.chem.uga.edu

4. Inquire about MOBY:  there is an advert for MOBY 1.5 on p A27 of
J Chem Ed, 1994 Feb (Springer Verlag, Electronic Media Dept, 175 Fifth Ave,
New York, NY 10010, Tel (212)460-1653.
Errol Lewars,  Trent University
====

5. Jack, MOPAC for DOS is very good. The only thing I'm not happy about is it
doesn't have a graphical interface to create Input with. You have to literally
type in the numbers describing the geometry in order to create an Input, whihc
is very prone to error. I've never done this. Fortunately my advisor spent ca.
$1000 buying CAChe package including MOPAC and its Editor. The latter is a
chemistry-informed drawing program. I can use it to create a correct MOPAC
Input for any platform including DOS.

I have a feeling that somewhere on the Internet there's a program we can use in
place of my CAChe Editor. Somebosy suggested SYBIL but the free version can
only accept 10 (?) atoms which is too small for me. If you get a response about
such a program, please let me know. Thank you.

Yong
y0h8797@acs.tamu.edu

6. Hi,
   I am not sure if this is what you are looking for but the price is
right. My group produces the GAMESS ab initio package which includes
several semi-emperical wavefunctions (AM1, PM3...). It runs on most
workstations and on PowerMacs. If you are interested you can check out
our WWW page at http://www.msg.ameslab.gov/   or send an email to
Mike Schmidt at mike@si.fi.ameslab.gov to request a copy. There is no
charge, but we do require that you sign a simple license agreement.

Brett
--

7.    I think Mopac95 is a good choice. It is easy to get
the source code on the Internet. In addition, there are
few freeware of drawing molecules and those data format
could be converted by "babel"(also freeware).


xxx   name withheld on request.

8.   Spartan is coming out with desktop computer versions which, although
not cheap, probably cost about the same as many textbooks students are
accustomed to paying for.  I would appreciate receiving a summary of
responses to this question.

__________________________________________________________

                      Abby Parrill
                  Chemistry Department
      Artificial Intelligence in Chemistry Laboratory
                The University of Arizona
             abby@mercury.aichem.arizona.edu

__________________________________________________________

9.
Hello,
        Contact Serena Software Co in Bloomington, INDIANA
They have made semi-empirical package MOPAC available
for PC/Mac. Price very nominal.
Ramesh

10. MacSpartan (PowerMac version) could do the job. It includes quantum
mechanics (ab initio and semiempirical) and molecular mechanics methods.
Its high-end graphics provides great visual teaching tools
for organic chemistry. It prices at $299 (US & Canada academics).
Along with it, Wavefunction also offers publications related to your
purpose - teaching in organic chemistry:

(1) Educational CD-ROM: "Visualization of chemical structures and reactions",
    (facusing on organic chemistry), by Tom Hehre, Lonnie Burke,
    Wayne Huang, Warren Hehre, 1995.

(2) Self-guided Tutorial: "A MacSpartan Tutorial", Wavefunction, 1996.

(3) Experiment book: "A Laboratory Book of Computational Organic Chemistry"
    by Warren Hehre, Wayne Huang & Alan Shusterman, 1996.

For more information, check http://www.wavefun.com/MacSpartan.html

--Wayne

11. and Ralph Puchta's summary of responses to his similar question.

>Dear CCL-Users!
>
>1. Does anyone know free semiempirical calculation program, that are not
>     versions of ampac and mopac.
>2. Which was the last free version of ampac?
>3. Are there any free forcefield calculating programs?
>4. On which ftp-server can I find these programs?
>
>Thank you very much for your help
>
>Ralph Puchta

***************************************************************************

Here is my summary - and many thanks to all that wrote to me and helped.

>1. Does anyone know free semiempirical calculation program, that are not
>   versions of ampac and mopac.

There is a program called VAMP, that should be free up to VAMP 4.5.

>2. Which was the last free version of ampac?

All the MOPAC programs with single digit extensions, e.g. MOPAC 5, MOPAC 6,
MOPAC 7, are public domain, and are `free'.

Jimmy Stewart

jstewart@fujitsu.com (Dr. James Stewart)



>4. On which ftp-server can I find these programs?

You can find free versions of MOPAC6 & MOPAC7 for DOS, LINUX and sources
at www.ccl.net. Look in the webpage of CCL.
I couldn't compile MOPAC7 for the SGI.

Dr.Edgardo Garcia
Cristol Chem & Biochem
University of Colorado at Boulder

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++End

A word to VAMP: I know it, as we use the newest version, that you have to
buy, on our
workstations in the university. If you can handle MOPAC5 to MOPAC7 you can
handle VAMP
also very good. AMPAC is also as suitable, but in my oppinion the available
versions on
ftp are to old, MOPAC is much newer. MOPAC is now developed also for
buying, but if you
look in chemical newspapers, there are still a lot of articels, that were
calculated with
MOPAC6. I personal run MOPAC6 on my PC by using DOS and by using LINUX. I
have to point
out the version compiled for LINUX is faster. The general handling is the same.
The geometric input for the molecules and nearly all keywords are the same.
So MY PERSONAL hint for your problem "no money - good results" is use MOPAC.

A friend of mine used archie and gave me the following. here you can find
MOPAC and related
things.

Host www.ccl.net    (128.146.36.48)
Last updated 03:47  5 Aug 1995

    Location: /pub/chemistry/documents
      DIRECTORY    drwxr-xr-x     512 bytes  00:00 22 May 1994  mopac_doc

    Location: /pub/chemistry/documents/mopac_doc
      FILE    -rw-r--r--  521604 bytes  23:00  6 Oct 1992  mopac6.doc
      FILE    -rw-r--r--  494856 bytes  00:00 16 Nov 1992  mopac6.ps

    Location: /pub/chemistry/software/DEC-ALPHA
      DIRECTORY    drwxr-xr-x     512 bytes  00:00  1 Dec 1994  mopac6

    Location: /pub/chemistry/software/MS-DOS/mopac_for_dos
      DIRECTORY    drwxr-xr-x     512 bytes  10:51 17 Feb 1995  mopac6

    Location: /pub/chemistry/software/OS-2
      DIRECTORY    drwxr-xr-x     512 bytes  00:00  1 Dec 1994  mopac6

    Location: /pub/chemistry/software/LINUX
      DIRECTORY    drwxr-xr-x     52 bytes  14:34 27 Jun 1995  mopac7

    Location: /pub/chemistry/software/MS-DOS/mopac_for_dos
      DIRECTORY    drwxr-xr-x     512 bytes  16:53 16 Mar 1995  mopac7

    Location: /pub/chemistry/software/LINUX/mopac7/older_version_do_not_take
      FILE    -rw-r--r--     618 bytes  00:00 18 Aug 1994  mopac


Host ftp.uni-koeln.de    (134.95.100.202)
Last updated 05:16  3 Aug 1995

    Location: /usenet/comp.archives/bionet/chemistry
      DIRECTORY    drwxrwxr-x    2048 bytes  22:00 22 Apr 1993  mpac


Host www.ccl.net    (128.146.36.48)
Last updated 03:47  5 Aug 1995

    Location: /pub/chemistry/software/LINUX/mopac7/older_version_do_not_take
      FILE    -rw-r--r--  811586 bytes  00:00 19 Aug 1994  mopac7.Z

    Location: /pub/chemistry/software/MS-DOS
      DIRECTORY    drwxr-xr-x     512 bytes  10:51 17 Feb 1995  mopac_for_dos

    Location: /pub/chemistry/software/MS-DOS/mopac_for_dos/mopac6
      FILE    -rw-r--r--  627791 bytes  00:00 22 Dec 1993  mopac.exe.Z
      FILE    -rw-r----  471300 bytes  00:00 22 Dec 1993  mopacdos.zip

    Location: /pub/chemistry/software/MS-DOS/mopac_for_dos/mopac7
      FILE    -rw-r--r--  585910 bytes  16:45 16 Mar 1995  mopac7b.zip

    Location:
/pub/chemistry/software/MS-DOS/mopac_for_dos/mopac7/old-version.95.02.17
      FILE    -rw-r--r--  389585 bytes  11:03 17 Feb 1995  mopac7b.zip

    Location: /pub/chemistry/software/MS-DOS/mopac_for_dos/mopac7
      FILE    -rw-r--r--  540413 bytes  16:46 16 Mar 1995  mopac7s.zip

    Location:
/pubchemistry/software/MS-DOS/mopac_for_dos/mopac7/old-version.95.02.17
      FILE    -rw-r--r--  359562 bytes  11:03 17 Feb 1995  mopac7s.zip

    Location:
/pub/chemistry/software/MS-DOS/mopac_for_dos/mopac7/junk-do-not-look-here
      FILE    -r-xr-xr-x 3541222 bytes  11:04 10 Mar 1995  mopac7.dos.big
      FILE    -r-xr-xr-x 1725514 bytes  11:04 10 Mar 1995  mopac7.dos.sml

    Location: /pub/chemistry/software/OS-2/mopac6
      FILE    -rw-r--r--  491975 bytes  00:00  1 Dec 1994  os2mopac.zip

    Location: /pub/chemistry/software/SOURCES/FORTRAN
      DIRECTORY    drwxr-xr-x     512 bytes  00:00 22 May 1994  mopac6_sources
      DIRECTORY    drwxr-xr-x     512 bytes  12:18  5 Jul 1995  mopac7_sources

    Location: /pub/chemistry/software/SOURCES/FORTRAN/mopac6_sources
      FILE    -rw-r--r-- 1104875 bytes  00:00 23 Feb 1994  mopac6.tar.Z
      FILE    -rw-r--r--  857080 bytes  00:00 19 Mar 1994  mopac6.zip

    Location: /pub/chemistry/software/SOURCES/FORTRAN/mopac7_sources
      FILE    -rw---r--  331505 bytes  00:00 26 Jan 1995  mopac7-man-300.ps.Z
      FILE    -rw-r--r-- 1487313 bytes  00:00 19 Aug 1994
mopac7-man-300.ps.Z.orig-does-not-work
      FILE    -rw-r--r--  378449 bytes  00:00 26 Jan 1995  mopac7-man-600.ps.Z

For AMPAC try www.ccl.net:

software/SOURCES/FORTRAN/mopac6_sources:
total 2529
-rw-r--r--  1 ccl        597133 Feb 23  1994 ampac21.tar.Z


If you are looking for a visualistion tool for your outputs try CASCADE V2.
This version is
in the moment only for DOS/OS/WINDOWS available, but we hope that up to
february we have
CASCADE V3 running, it should run with DOS/OS/WINDWS and X. And the most
interesting
it is copyrighted as GNU - that meens free for all! For more infos about
CASCADE, mail
me, as I am a member of the CASCADE Development Team. As we do not have the
chance
to test CASCADE V3 on a X for MACs, I do not know if it will run on MAC
too. Here is the
text I mailed to the CCL some weeks ago.

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++start

Dear CCL users!

We proudly announce our program CASCADE:

Here the readme-file

****************************************************************************
*****

C A S C A D E   V 2     (DOS/Win/OS2 VERSION)
==========================================================================
>> Cascade Aids Semi-empiric Calculators Access Displays Eventually :-) <<
==========================================================================
Cascade V2 is a shell which converts semi-empirical data (from programs
like MOPAC, AMPAC and VAMP) into several 3d graphic formats. It thus
enables the user to visualize the resulting molecule geometry. The supported
display programs are:
  3DV, Chemview, JMR, MOLWIN, MV, PC MODEL, PLUTON, POVRAY,
 RASWIN.
--------------------------------------------------------------------------
Andreas Dosche          (dosche@mi.uni-erlangen.de)
Ralph Puchta            (puchta@anorganik.chemie.uni-erlangen.de)
Michael Reichenb"acher  (reichenb@mi.uni-erlangen.de)
--------------------------------------------------------------------------
Please use the program install.exe to uncompress cascade.zip,
otherwise you have to set the environment variables CASCADE and AWKDIR
manually.
If you have used install.exe, you can use cascade.bat to start cascde.

****************************************************************************
*****

You can get CASCADE via ftp:

ftp://www.ccl.net/pub/chemistry/software/MS-DOS/cascade

ftp://uni-stuttgart.de/pub/scivi/cascade

You have to get 3 files:

cascade2.rea -> the readme file (you have read in *)
cascade2.zip -> the program
install.exe  -> this part installs CASCADE in the right way on your PC

We hope that you will enjoy it.
If you find any bugs or have any problems, think something should be changed,
should be added or any thing else, feel free to contact us.

We wish all CCl users a merry Christmas and a happy new year 1996.

Andreas Dosche
Ralph Puchta
Michael Reichenb"acher

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++end

I think you know most of the supported programs and you know, that they are
free or not
to expensive, too.


If you want to combine the education in ab initio and semiempirical calculation,
you can use GAMESS, that can do both, as they included parts of MOPAC. But
I never tried
it myself, for more infos try:

Mike Schmidt via e-mail (mike@si.fi.ameslab.gov).

As far as I know it runs on PC only via LINUX. About MAC I do not know anything.
I fear GAMESS will not be supported in CASCADE V3, as I had not the time to
get into GAMESS.

To run Linux you need a PC 386 or higher, for running MOPAC5 you need also
as 386
or hihger. I personal run my semie-empiric calculations at home on a 486 DX
2/66, and
in order to calculate e.g. C60 it lasts a night.


I hope this helped a little bit.

Many greetings


Ralph Puchta

Puchta@anorganik.chemie.uni-erlangen.de


Jack Martin Miller
Professor of Chemistry
Adjunct Professor of Computer Science
Brock University,
St. Catharines, Ontario, Canada, L2S 3A1.

Phone (905) 688 5550, ext 3402
FAX   (905) 682 9020
e-mail jmiller@sandcastle.cosc.brocku.ca
http://chemiris.labs.brocku.ca/staff/miller/miller.html




From smiguel@obelix.cica.es Mon Jan 29 06:01:52 1996
Received: from obelix.cica.es  for smiguel@obelix.cica.es
	by www.ccl.net (8.6.10/950822.1) id GAA20205; Mon, 29 Jan 1996 06:01:34 -0500
Received: (from smiguel@localhost) by obelix.cica.es (8.7.1/8.7.1) id LAA19007 for chemistry-request@www.ccl.net; Mon, 29 Jan 1996 11:58:35 +0100 (GMT-1:00)
Date: Mon, 29 Jan 1996 11:58:35 +0100 (GMT-1:00)
From: Miguel Angel San Miguel <smiguel@obelix.cica.es>
Message-Id: <199601291058.LAA19007@obelix.cica.es>
To: chemistry@www.ccl.net



Hi netters,

I am interested in getting slabs with different Miller indexes 
from unit cell. The slabs must be periodical in the other two
directions. Do you know any book or reference about this problem? 
 Is there any free software to generate these slabs?.

 I'll send a sumary with your answers
	
Thanks in advance,

Miguel Angel


--------------------------------------------------------------

			Miguel Angel San Miguel Barrera
				PhD Student

			Departamento de Quimica-Fisica
			Facultad de Quimica
			Universidad de Sevilla
			E-41012  Sevilla
				- SPAIN -

			Phone: 0034-5-455 71 77
			FAX  : 0034-5-455 71 74
			e-mail: smiguel@obelix.cica.es


From Jeffrey.Gosper@brunel.ac.uk  Tue Jan 30 04:08:34 1996
Received: from monge.brunel.ac.uk  for Jeffrey.Gosper@brunel.ac.uk
	by www.ccl.net (8.6.10/950822.1) id EAA09664; Tue, 30 Jan 1996 04:07:29 -0500
Received: from chem-pc-22.brunel.ac.uk by monge.brunel.ac.uk with SMTP (PP) 
          id <02485-0@monge.brunel.ac.uk>; Tue, 30 Jan 1996 09:07:08 +0000
Date: Tue, 30 Jan 1996 09:07:04 GMT
From: Jeffrey J Gosper <Jeffrey.Gosper@brunel.ac.uk>
Reply-To: Jeffrey.Gosper@brunel.ac.uk
Subject: WWW pages for Re_View with URL
To: chemistry@www.ccl.net, ORGCHEM@EXTREME.CHEM.RPI.EDU,
        chem-education@mailbase.ac.uk
Message-ID: <ECS9601300904A@brunel.ac.uk>
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Dear colleagues,

sorry the last messages was missing the URL. Here it is again
with the URL

http://http1.brunel.ac.uk:8080/depts/chem/ch241s/re_view/re_view.htm
 
I am pleased to announce that a WWW page has been setup to support my 
program Re_View as well as provide a range of information of relevance to 
molecular animations in general.

If your not aware of Re_View, it's a Windows program that enables the 
visualization and analysis of dynamic reaction data such as conformational 
analysis, reaction pathways, vibrational modes, etc. I find it very useful 
both in research (particularly in examining MOPAC outputs) and in teaching 
undergraduates about such data.

The site provides general information about the program, a free 
demonstration version of Re_View, a number of example molecular 
animations/simulations (both a coordinates and as movies), pointers to other 
relevant pages, and also a program that aids in the analysis of MOPAC IRC 
calculations.

Please take a look at the site and if you feel that you have information 
and/or a WWW page that should be included please let me know.  

/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
 Dr. Jeff Gosper                                         
 Dept. of Chemistry		                        
 BRUNEL University                                     
 Uxbridge Middx UB8 3PH, UK                            
 voice:  01895 274000 x2187                            
 facsim: 01895 256844                                  
 internet/email/work:   Jeffrey.Gosper@brunel.ac.uk     
 internet/WWW: http://http1.brunel.ac.uk:8080/~castjjg 
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/



From gerwens@mbox.theochem.uni-hannover.de  Tue Jan 30 09:38:39 1996
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Subject: Electrost.Pot.Biomol;Graphic Software?
To: chemistry@www.ccl.net (CCL CCL)
Date: Tue, 30 Jan 1996 15:36:08 +0100 (MET)
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Dear CCLers,
I'm working on a model to calculate the electrostatic potentials of
Biomolecules, e.g. Proteins.
This model is based on the ADM-model (J.Chem.Phys. 99,1224 (1993)),
which gives you a good approximation of the electrostatic potential
of small molecules.
For this model you need atomic charges and dipole moments (CAMMs),
which have to be calculated from a wavefunction using some population
analysis. In the original ansatz ab initio 6-31G* SCF wavefunctions
were used to calculate the CAMMs with the Mulliken population
analysis.
In my work I'm trying to model these CAMMs (atomic charges and dipoles)
and to use these CAMMs to calculate the electrostatic potentials of
large proteins. In the model, to calculate the CAMMs, intramolecular
polarization is included.
Besides the electrostatic potential the ADM-model also provides
an approximation of the electronic density. Therefore 
the isodensity surfaces of such large molecules are easy to access.
The isodensity surfaces are a valuable tool to interpret the shape
of a system. My aim is to represent the electrostatic potential
of proteins on their isodensity surfaces. Currently the
isodensity surfaces are calculated with the 'Marching Cube'
Algorithm (J.Comp.Chem. 14,246 (1993)). 

Now the questions:

a) The graphical tools I currently use to draw the electrostatic potential
   on the isodensity surfaces are inadequate to use for such a large system 
   as a protein. I'm looking for a graphical device, which is able
   to handle this problem. It should be able to draw the surface triangles
   created by the Marching Cube algorithm at a rate of 10,000 per second.
   
b) I'm looking for a cooperation with somebody, who is interested in
   the application of my model. As input data for the model only
   cartesian coordinates of all atoms (including hydrogen) 
   of a protein are required. As output data you get atomic charges
   and atomic dipole moments. With the ADM-model electrostatic
   potentials on isodensity surfaces can be calculated. Applications
   which directly interpret the electrostatic potential would be nice.
   Currently metal atoms are not feasible.
   

Heiko Gerwens


Institut fuer Theoretische Chemie 
Universitaet Hannover
Am Kleinen Felde 30
D-30167 Hannover
Germany

email: gerwens@mbox.uni.hannover.de
   


From joubert@ext.jussieu.fr  Tue Jan 30 10:08:39 1996
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Date: Tue, 30 Jan 1996 16:07:49 +0100
To: chemistry@www.ccl.net
From: joubert@ext.jussieu.fr (JOUBERT laurent)
Subject: Semi-empirical with lanthanides


Hi all,

Does anybody know a semi-empirical program working with lanthanides and
actinides ?

Thanks in advance for your answers.

Laurent JOUBERT

------------------------------------------------------------------
                          JOUBERT Laurent

          Ecole Nationale Superieure de Chimie de PARIS
Laboratoire de Modelisation appliquee a la Chimie et aux Procedes
                  11, rue Pierre et Marie Curie
                      75005 PARIS - FRANCE

               E-Mail : joubert@ext.jussieu.fr
                        Tel : 44-27-66-94
              Website : http://www.enscp.jussieu.fr
------------------------------------------------------------------



From ysandler@post.smu.edu  Tue Jan 30 10:23:39 1996
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Date: Tue, 30 Jan 1996 09:16:22 -0600 (CST)
From: Yakov Sandler <ysandler@post.cis.smu.edu>
Subject: propellanes
To: chemistry@www.ccl.net
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Hello, everyone!

I am intersted in studying bonding in propellanes. It was reported ( 
Kenneth B. Wiberg et al. J. Am. Chem. Soc. 1982, 104, 5240-5242), that 
localized orbital calculations suggest that the central bond in 
[1.1.1]propellane has a bond order close to zero. 
I used spartan to calculate the natural bond order in this molecule. My 
ab initio (HF/6-31G*) calculation showed that the C1 and C2 of the 
central bond have different electron density distribution, and (!) each 
one of them has a different BOs in bonds with atoms 3, 4, and 5, even 
though the starting geometry is perfect D3h!
My question is if anyone has dealt with this problem and can give me a 
hint of what is going on. Also, are there any references to recent 
developments in this area.

Thanks in advance

Yakov I. Sandler
Southern Methodist University
ysandler@post.cis.smu.edu 


From owner-chemistry@ccl.net  Tue Jan 30 10:38:40 1996
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Date: Tue, 30 Jan 1996 10:26:03 -0500 (EST)
From: Taisung Lee <taisung@chem.duke.edu>
To: chemistry@ccl.net
Subject: Summary: Good Fortran Compiler for computational science on PC
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    Several weeks ago I posted a question about Fortran compiler 
and I got much nice and useful information.  Thanks to all repliers.

Taisung Lee


    Here is the summary:



From: shenkin@still3.chem.columbia.edu (Peter Shenkin)

Lahey is widely regarded as the best Fortran compiler for Pentium 
platforms.  They also have a Fortran 90.

Few people find that actual performance on real-world codes parallels
any "standard" benchmarks, such as specfp92.  We'll all be interested
in hearing comparative benchmarks for your quantum code on Pentium and
IBM RISC.

	-P.



From nash@chem.wisc.edu Thu Jan  4 22:18:19 1996

I am an end-user of computational software for chemistry, and I have been
glad to see useful computational packages showing up on desktop computers.
When looking for a "PC" platform to develop for, don't forget the one that
uses same RISC technology that those RS6000s do, i.e. the PowerPC.  The
FORTRAN-coded quantum package GAMESS has been successfully ported to
PowerMac, and the authors state:

>Most operating systems on the IBM PC (and its clones) are too small to run
>GAMESS. Typically
>GAMESS compiles to over 8 MBytes of object code alone, making it difficult
>to work with most
>PC operating systems. There are also too many different compilers and
>floating point coprocessor
>options for us to attempt to maintain a PC version. Therefore we do not
>have any version of
>GAMESS for DOS, Windows, NT, or OS/2. NT and OS/2 would be capable of running
>GAMESS but you are on your own if you wish to try it.

This "big, real" computational program was compiled using Language Systems
FORTRAN for PowerMac.  Overall run times are about 3 times an IBM RS6000
model 350 on a PM7100/66.  The cost-to-computational-power ratio is rather
nice!

Another quantum mechanical program on this platform is the newly-released
MacSPARTAN.  There's more than FORTRAN code to that, of course, but it
illustrates the utility of the system as a viable computational
workstation.

I have no affiliation with Apple other than being a satisfied PowerMac
customer.  If you have significant investment in CISC-based systems, or
strong operating system biases, this may not be an option, but
FORTRAN-based chemistry code on the PowerMac is certainly possible and runs
quite impressively.

Relevant URL:

http://www.msg.ameslab.gov/GAMESS/GAMESS.html

-john nash, UW-Madison




From landman@motown.detroit.sgi.com Thu Jan  4 22:57:40 1996

On the QMD code I use, this the the approx performance table:
(single cpu times only)

cpu		OS 		time (in seconds) per time step
---------------------------------------------------------------
486/DX33	OS/2 Warp	3000  (memory starved at 8 meg)
R3000/40MHz	IRIX 5.3	900
SuperSparc/33MhzSolaris		700
Pentium/133MHz	OS/2 Warp	290  (64 Meg ram)
R4400/150MHz	IRIX 5.3	126  (Indy w 96 meg ram)
RS6000/590	AIX		120
Cray J90	Unicos		87 
Alpha/266	OSF1		82
R8000/75MHz	IRIX 6.1	55   (2 meg cache, 384 meg ram)
R8000/90MHz	IRIX 6.1	47   (4 meg cache, 2 gig ram)
(no data on R10k ... yet :-) )

64 atom supercell, same configuration and input file on all machines.

THe fortran compiler on the PC was the Watcom 9.01e, and the
combination of gcc/emx and f2c (which did quite well).

The Pentium unit is my advisors home PC that we are using for additional 
cycles for the rest of the group.

THe R8k times are low as a result of my optimizing the time consuming 
portions of the code to make use of fused multiply add instructions and 
working very hard to get a good instruction scheduling out of the compiler.

I used a 64 atom supercell as my standard test as that is what I tend to 
work with.  When I go to larger supercells, all but the largest memory 
machines quit. At 512 atoms, even the powerchallenge is spending 
more time swapping (with 4 GB ram installed) than computing.

My thoughts are that the Pentium133 and higher with sufficient ram and a 
FAST disk (the current crop of ATA4 are not as fast as SCSI II) ought to 
be a good cheap entry level workstation for development and testing 
work.  I prefer an Indy, but I think I am biased (see the .sig).  
For the production medium and big runs, you really do need to look at the 
heavy metal (the superworkstations).  Run a stable OS on the box such as 
Linix or OS/2 Warp Connect and the machine will be very useful.

Joe


From: "Walter E. Reiher III" <wally@CompChem.com>

Related issues have been raised here before, so I'm responding to the list:


I've spent an inordinate amount of time over the past year and a half or so
fiddling around with PC FORTRAN compilers, and the bottom line, IHMO, is
that you'd better not count on them being like what you're accustomed to
under UNIX.  In general, PCs seem like a false economy to me.

There are two issues here:  the compiler and the operating system.

You don't mention which OS you're using, but MS FPS only runs under NT or
Win95.  If you're running Win95, or DOS/Win, that's the first thing to get
rid of.  Windows NT is a reasonable OS; many say OS/2 is also.  There are
also UNIXes available for Intel CPUs.  Just don't waste your time with a 16
bit OS like DOS or a hybrid 16/32 system like 95.
     Many 'big program' problems are related to trying to run in 16 bits or
tricking a 16 bit OS into looking like a 32 bit one.  How long has it been
since we're tried doing this with UNIX?  Years!  Who needs to go back to _that_?

On compilers, I've worked with three--Watcom, MS FORTRAN PowerStation 32
(predecessor to 4.0), and Absoft--and all of them have some problems for my
applications, which involve mixed FORTRAN and C programming and
interoperability with a MS Visual C++ graphics DLL.  Watcom had loads of
incompatibility problems and really poor tech support, but produces fast
code when you can make it work.  MS FPS also produces fast code and has a
nice development environment, but has surprisingly poor interoperability
with C.  I'm continuing to use Absoft, who has excellent tech support and C
interoperability but produces slow code on a Pentium and has some other quirks.
     Other compiler vendors I have not tried include Salford (a British
company; expensive compiler but it must be a 'real' one since all of Chem-X
builds under it), Microway NDP, and Lahey.
     BTW, I've only used these as FORTRAN 77's, not 90's.

If you don't need to worry about working with C and calling DLLs, life will
probably be easier for you.  It seems to me that FORTRAN really isn't taken
seriously by the compiler vendors--the emphasis is on C/C++.
     I was disappointed to learn this week that the FORTRAN on my
'reference' platform, the SGI, also isn't what it used to be.  Some switches
that I found valuable for finding bugs in old code on my old IRIX 5.2 system
are missing on my new IRIX 6.1 system (e.g., -trapuv and -u).

See the "SciTech Software for Science" catalog for a comprehensive list of
FORTRAN compilers and other technical software tools.  800-622-3345,
http://www.scitechint.com/scitech/.  I'm not affiliated with them.

Hope this helps...good luck.  I'd be interested in hearing the experiences
of others.

Wally
========================================================================
Walter E. Reiher III, Ph.D.                           Wally@CompChem.com
CompChem Innovations
P.O. Box 61056                                        voice 408-720-0240
Sunnyvale, CA 94088                                     fax 408-720-0378


From: Craig Taverner <craig@hobbes.gh.wits.ac.za>

We use PC's as computational tools extensively in crystallography, but we 
run them all (the computational ones that is) under LINUX for which f77 
is freely available (g77 and f2c), and we also have the NAG f90 compiler, 
which so far seems to compile fine with true fortran 90 programs, but has 
proved to be somewhat tricky with fortran 77 programs.  Unfortunately I 
have not used it nearly enough to give you any performance spec.'s or say 
whether it can cope with very large programs, but I should certainly 
expect it to be able to.

So far our experience with using Linux instead of Dos/windows has 
definitely demonstrated it to be more appropriate for computational 
work.

Contact NAG at:
           NAG Ltd                 NAG Inc
tel        +44 (0)1865 311744      +1 708 971 2345
fax        +44 (0)1865 311755      +1 708 971 2346
post       NAG Response Centre     NAG Response Center
           NAG Ltd                 NAG Inc
           Wilkinson House         1400 Opus Place
           Jordan Hill Road        Suite 200
           OXFORD                  Downers Grove
           United Kingdom          IL 60515-5702
           OX2 8DR                 USA
email      infodesk@nag.co.uk      infodesk@nag.com
www        http://www.nag.co.uk
gopher     NAME=NAG Gopher Server, Type=1, Port=70, Path=1/,
           Host=www.nag.co.uk

This is straight from their magazine, verbatum.  I hope it's not 
overboard.

Cheers, Craig

"If God had meant us to be naked, we would have been born that way."

Craig Taverner
Structural Chemistry, University of the Witwatersrand, South Africa



From: Guo Jian-xin <guojx@infoc3.icas.ac.cn>

Hi,
   Your question about the compiler maybe get:
The NDP fortran compiler is good as the microft fortran complier. It is a
 better choice.
regards,
J.X. Guo


From: frits@chemde4.leidenuniv.nl (Frits Daalmans)

hello,

I think that NAG (Numerical Algorithms Group) sells a Fortran 90 compiler 
for Linux.
Lemmesee...
no, sorry, I don't have more information.

Greetings,
Frits

Frits Daalmans
OIO Conformational Analysis
Gorlaeus Laboratoria
Leiden, The Netherlands
E-mail: frits@chemde4.leidenuniv.nl
Tel: [+31] (0)71-5274505


From: jochen@sunserver1.rz.uni-duesseldorf.de

Yeah, it is FORTRAN 90, maybe it's NAG.
If it is not YAG, I will tell you after I asked my friend.

Jochen


From: rbw@msc.edu (Richard Walsh)


Taisung,

You should try Absoft at 810-853-0050 (www.absoft.com). They have 
F77 and F90 for PC. Their F90 is compatible with the F90 on Cray
platforms so you codes should compile error free on either machine.
The same F90 is available for SUNs and I will be made available
for other workstations in the future.

Richard Walsh
Minnesota Supercomputer Center, Inc.

P.S. They also have compilers for Macs I think.


From: case@scripps.edu (David Case)

I'd be interested to know what sorts of errors you encountered, and on
which OS.  Do the errors show up in F77 code, or in the F90-specific parts?
I have used this compiler on a P6/NT machine with good success on very
large F77 molecular mechanics programs.

 ..thx...dac

==================================================================
David A. Case                    |  internet:    case@scripps.edu
Dept. of Molecular Biology, MB1  |  bitnet: case%scripps.edu@sdsc
The Scripps Research Institute   |  fax:             619-554-3789
10666 N. Torrey Pines Rd.        |  phone:           619-554-9768
La Jolla CA 92037  USA           |  WWW:  http://scripps.edu/case
==================================================================

From: zauhar@xhost5.tripos.com (Randy Zauhar)

To: Taisung Lee <taisung@chem.duke.edu>
Subject: Re:  CCL:Good Fortran Compiler for computational science on PC?
--------------------
   Taisung,

      There is a company called Lahey (in Nevada, I believe) that specializes
  in FORTRAN compilers for PCs. I investigated their products a few years 
  ago and was favorably impressed with what they offered, although I did not
  end up buying anything from them. They use to regularly have ads in BYTE
  magazine. If you cannot find their address, I think I still have some of 
  their literature laying around. 

        Randy


All opinions expressed here are mine, not my employer's

///////////////////////////////////////////////////////////////////////// 
\\ Randy J. Zauhar, PhD             | E-mail: zauhar@tripos.com        //
\\ Tripos, Inc.                     |       : zauhar@crl.com           //
\\ 1699 S. Hanley Rd., Suite 303    |  Phone: (314) 647-1099 Ext. 3382 //
\\ St. Louis, MO 63144              |                                  //
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**   of, then the conception and the thing appear to co-incide."       **
**   --- C.G. Jung                                                     **
*************************************************************************







From Patrick.Bultinck@rug.ac.be  Tue Jan 30 11:08:40 1996
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Date: Tue, 30 Jan 1996 16:53:34 +0100 (NFT)
From: Patrick Bultinck <Patrick.Bultinck@rug.ac.be>
To: CCL <chemistry@www.ccl.net>
Subject: MMx studies of chelates
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Dear netters,

Can anybody point me to a good (meaning of good is explained later) 
reference to articles where studies of chelate complexes formed between 
ligands such ethylenediamine (or the glycol) and 1,3-propanediamine (or 
the glycol) and main group ions. By 'good' I mean an article from which I 
can also learn something on the method used (and NOT only the program 
used). E.g. what charge distributions were used, maybe atom types etc.

Is it 'normal' that this very important information is usually neglected 
? By simply taking another force field and parameters it is sometimes 
possible to conclude the entirely opposite !

Thanks,

Patrick Bultinck
Univ. of Ghent, Belgium



From patnaiss@Picard.ml.wpafb.af.mil  Tue Jan 30 11:38:40 1996
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From: patnaiss@Picard.ml.wpafb.af.mil (Soumya S. Patnaik MLPJ UTC)
Message-Id: <9601301625.AA10051@Picard.ml.wpafb.af.mil>
To: chemistry@www.ccl.net
Subject: looking for a rigid body minimization prog



Dear Colleagues,

I am looking for a program that would do
minimization of the energy of association of two or
more molecules while considering each molecule rigid.

Does anyone have access to such a program? Thanks in advance

Soumya Patnaik

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Dr Soumya S. Patnaik         email:  patnaiss@picard.ml.wpafb.af.mil +
+ Materials Laboratory, Wright Patterson AFB                           +
+ usmail:  WL/MLPJ, Bldg 651, 3005 P St, Ste 1, WPAFB, OH 45433-7702   +
+ Telephone:  (513) 255-6671 ext.3116           FAX:  (513) 255-1128   +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

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Spartan can do this

xiaopeng

=======================================================
			Chemistry Graduate student
			215-2047149(office)
			215-5357188(home)
			xiaopeng@astro.ocis.temple.edu
======================================================

On Fri, 26 Jan 1996, Mathias Brock wrote:

> Hallo netters,
> 
> I investigated the document about MO visualizers and found a lack
> of electronic structure viewers. Most often just the molecular
> structures were visualized.
> The few suitable programs were used on specific hardware platforms
> thus PC's-based programs were scarce.
> In connection to MS-Windows-based text-processing I'm looking
> for a program generating electronic density graphics from G9x-output. 
> It shall be great to have isosurfaces for planes through a molecules.
> Anybody, who has found or writen programs doing this, should be free to mail
> me about their experience. I'll summaries on the net.
> 
> Mathias Brock
> 
> 
> 
> ---
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From vuckovic@hyper.com  Tue Jan 30 12:38:41 1996
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From: Dragan Vuckovic <vuckovic@hyper.com>
Message-Id: <199601301734.MAA08975@www.hyper.com>
Subject: HyperChem User Group Meeting - 1996
To: chemistry@www.ccl.net
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             Hypercube, Inc. 
              presents the
          First World HyperChem 
           User Group Meeting 

          September 8-11, 1996
           Clevelands House,
           Minett, Muskoka
           Ontario, Canada


           First Announcement


HyperChem is like any other powerful tool: the more 
you know about it, the more you get from working 
with it.  For those who wish to learn more about 
working with HyperChem, the range of problems you 
can now tackle on a PC, and for those who wish to 
show other people how HyperChem can be used 
successfully in various fields of chemistry, Hypercube, 
Inc. (the developers of HyperChem) offer The First 
World HyperChem User Group Meeting.  


Objectives of the Meeting


There are many of you who are doing a remarkable job 
with HyperChem in the research and teaching fields. 
Additionally, there are certainly even more uses that 
we are not aware of, as to how you are using 
HyperChem. With this in mind, we would like to bring 
all of you together so that we can share ideas and 
information. Experienced HyperChem users will be 
invited to provide introductory talks, and we, at 
Hypercube,  will be there to present our views of how 
HyperChem can be used and our vision of future 
developments of HyperChem. We would like to hear 
your suggestions, since HyperChem is made for you, 
the end user.

A small computer lab will be available, so that after the 
official hours of the Meeting, we can exchange ideas, 
demonstrate and learn the new uses and applications of 
HyperChem; or you can simply enjoy the beach, pools, 
tennis courts, or other facilities of this beautiful resort 
in the middle of Muskoka county and gorgeous 
Muskoka lake. 

Outline of the Meeting

The Meeting will be divided in three sections 
depending on particular  HyperChem (or other 
Hypercube products) uses  in:
(A) Research
(B) Teaching
(C) Association with other programs

The first section (A), HyperChem in Research, 
will cover all the fields in chemistry and 
biochemistry where HyperChem can be used. 

The second section (B), HyperChem in 
Teaching, will cover all the teaching levels of 
chemistry where HyperChem is used. 

The third section (C), HyperChem in 
Association with other Programs, will cover all 
the possible uses of HyperChem in conjuction 
with other programs in the Windows environment 
(automation using scripts or Excel Macros, etc.) 
as well as the use of HyperChem in association 
with other molecular modeling or quantum 
chemistry programs.


Costs and Venue

In order to organize this Meeting and to bring experts 
talk about HyperChem, a small Registration  fee of 
$100.00 US for academic, and $150.00 US for 
commercial users will apply. The Meeting will be held 
at Clevelands House, a beautiful resort on the 
Muskoka Lake just about 200 km north of Toronto. 
The resort has excellent conference facilities, as well 
as many recreational facilities, including four 
swimming pools, beach on the lake, tennis courts, 
water sports, facilities for children, etc. 

Accommodation

The accommodation for all the participants of the 
Meeting will be at Clevelands House (Approximate 
prices including all the meals, taxes, and recreational 
facilities: Single: $195.00 CAN; Double: $145.00 
CAN). Participants will be expected to make their own 
reservation directly with Clevelands House. Detailed 
instructions will follow in the Second Announcement 
on receipt of the attached form.


Transportation

Participants will be expected to make their own travel 
arrangements to Toronto International Airport.  Shuttle 
Bus service will be available  from the Airport to 
Clevelands House on both September 7th and 8th, as 
well as for the return to the Airport on September 11th 
and 12th. The Second Announcement will give 
complete details about the shuttle bus service, as well 
as the directions on how to reach Clevelands House if 
you are traveling by car. 

Preliminary Registration

To tentatively register for the Meeting and to receive 
the Second Announcement, please complete the 
enclosed form and return as soon as possible (before 
April 1) to:

Dr. Dragan Lj. Vuckovic
Hypercube, Inc.
Unit 7, 419 Phillip Street
Waterloo, Ont.
Canada N2L 3X2

e-mail: vuckovic@hyper.com
Tel. (519) 725-4040
Fax: (519) 725-5193

The Second Announcement will be mailed  in April 


        Preliminary Registration Form


        The First World HyperChem User 
                Group Meeting
      Clevelands House, Muskoka, ON, Canada
             September 8-11, 1996

Please send me the Second Announcement.

NAME 

__________________________________________________


ORGANIZATION 

__________________________________________________

POSITION 
__________________________________________________

ADDRESS FOR CORRESPONDENCE
__________________________________________________

__________________________________________________

___________________________________________________

TEL. NO. __________________FAX NO._________________



I am interested in attending the Meeting ___, or
attending the Meeting and presenting a paper ___,
in section A, B or C (circle the appropriate section). 


SIGNATURE				DATE

_____________________________________________________


___________________________________________________________________

Dr. Dragan Lj. Vuckovic               phone: (519) 725-4040 
International Marketing Manager         fax: (519) 725-5193
Hypercube, Inc.                      e-mail: vuckovic@hyper.com
419 Phillip Street                      URL: http://www.hyper.com
Waterloo, Ontario
Canada, N2L 3X2

From hinsenk@ERE.UMontreal.CA  Tue Jan 30 14:53:43 1996
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Date: Tue, 30 Jan 1996 14:48:33 -0500
From: hinsenk@ERE.UMontreal.CA (Hinsen Konrad)
Message-Id: <199601301948.OAA25966@cyclone.ERE.UMontreal.CA>
To: chemistry@www.ccl.net
Subject: Python code for computational chemistry


I have made some Python code for computational chemistry available at
the CCL archive. It can be found via the URLs

  ftp://www.ccl.net:/pub/chemistry/software/SOURCES/PYTHON/HINSEN
  gopher://www.ccl.net:73/11/software/SOURCES/PYTHON/HINSEN

For those who don't know Python, it's a high-level, object-oriented,
interpreted general-purpose programming language. There is a free and
reliable implementation that is being improved constantly by a growing
community of users. There is already an impressive range of extension
modules taking care of applications as diverse as Web browsers,
databases, and numerical calculations. For more information point
your Web browser at http://www.python.org.

Here's a short description of the modules at the CCL archive:

PDB.py

  High-level I/O with PDB files. Allows you to deal with PDB files as if they
  were lists of residues and atoms. Example:
     for residue in PDBConfiguration('protein.pdb'):
         for atom in residue:
             print atom.name, atom.position

Derivatives.py

  Automatic derivatives. Calculates analytical derivatives numerically, given
  only the original function. Example:
     x = DerivVar(1.1,0)
     y = DerivVar(0.44, 1)
     f = exp(x**2+y**2)
     print f
  prints:
     (4.06982499598, [8.95361499116, 3.58144599646])

Potential.py

  Automatic gradient calculation for potential functions (or any function).
  Example:
     def harmonic(k, r1, r2):
          dr = r1-r2
	 return k*dr*dr
     harmonic_g = PotentialWithGradients(harmonic)
     energy, gradients = harmonic_g(100., Vector(0,3,1), Vector(1,2,0)
     print energy, gradients
  prints:
     300.0
     [Vector(-200.0,200.0,200.0), Vector(200.0,-200.0,-200.0)]

Vector.py

  3d-vectors, used by the three other modules.

umath.py

  Simplified substitute for the module "umath" from the
  numerics package. Use it only if you don't have the
  numerics package. This module is used by all the other
  modules in this directory.

-------------------------------------------------------------------------------
Konrad Hinsen                     | E-Mail: hinsenk@ere.umontreal.ca
Departement de chimie             | Tel.: +1-514-343-6111 ext. 3953
Universite de Montreal            | Fax:  +1-514-343-7586
C.P. 6128, succ. Centre-Ville     | Deutsch/Esperanto/English/Nederlands/
Montreal (QC) H3C 3J7             | Francais (phase experimentale)
-------------------------------------------------------------------------------

From xiaopeng@astro.ocis.temple.edu  Tue Jan 30 15:53:44 1996
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Date: Tue, 30 Jan 1996 15:39:12 -0500 (EST)
From: Peking <xiaopeng@astro.ocis.temple.edu>
To: "Soumya S. Patnaik MLPJ UTC" <patnaiss@Picard.ml.wpafb.af.mil>
cc: chemistry@www.ccl.net
Subject: Re: CCL:looking for a rigid body minimization prog
In-Reply-To: <9601301625.AA10051@Picard.ml.wpafb.af.mil>
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On Tue, 30 Jan 1996, Soumya S. Patnaik MLPJ UTC wrote:

> 
> Dear Colleagues,
> 
> I am looking for a program that would do
> minimization of the energy of association of two or
> more molecules while considering each molecule rigid.
> 
> Does anyone have access to such a program? Thanks in advance
	
	I think that you can construct a z-matrix format of 2 molecule 
separately and then put them together, specify al the parameters in the 
molecule as constraints. so this just leaves 3 other parameters between 2 
molecule not constraint(they are distance, angle, and diherdral angle 
betwwen the first atom of the 2nd molecule and another atom you choose 
from the 1st molecule) . Then you just submit the job in G94

	This does work, but a little lousy to specify the constraints


xiaopeng

-----------------------------------------------------------------
				Chemistry Graduate Student
				215-5357188(home)
				215-2047149(office)
				xiaopeng@astro.ocis.temple.edu
-----------------------------------------------------------------

> 

> Soumya Patnaik
> 
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> + Dr Soumya S. Patnaik         email:  patnaiss@picard.ml.wpafb.af.mil +
> + Materials Laboratory, Wright Patterson AFB                           +
> + usmail:  WL/MLPJ, Bldg 651, 3005 P St, Ste 1, WPAFB, OH 45433-7702   +
> + Telephone:  (513) 255-6671 ext.3116           FAX:  (513) 255-1128   +
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 
> -------This is added Automatically by the Software--------
> -- Original Sender Envelope Address: patnaiss@Picard.ml.wpafb.af.mil
> -- Original Sender From: Address: patnaiss@Picard.ml.wpafb.af.mil
> CHEMISTRY@www.ccl.net: Everybody | CHEMISTRY-REQUEST@www.ccl.net: Coordinator
> MAILSERV@www.ccl.net: HELP CHEMISTRY or HELP SEARCH | Gopher: www.ccl.net 73
> Anon. ftp: www.ccl.net   | CHEMISTRY-SEARCH@www.ccl.net -- archive search
>              Web: http://www.ccl.net/chemistry.html 
> 

