From chemistry-request@server.ccl.net Thu Aug 16 08:20:29 2001
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Subject: Lannard jones parameters for Molybdenum..
From: Chinmoy Ranjan <ranjan@iitk.ac.in>
To: CHEMISTRY@ccl.net
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Dear cclers,
  Does any one have data for "lennard jones"  parameters for well
corresponding to  the following interactions..
Mo--H
Mo--O
Mo--S

Mo is for molybdenum.
Any kind of help would be sincerely appreciated..

yours faithfully,
Chinmoy Ranjan
IIT KANPUR.
INDIA


From chemistry-request@server.ccl.net Thu Aug 16 01:02:00 2001
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From: "tianxiao young" <txyoung@hotmail.com>
To: CHEMISTRY@ccl.net
Subject: ab initio MD code
Date: Thu, 16 Aug 2001 05:01:54 +0000
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Dear CCLers,

Do you know any released first principle molecular dynamical calculation 
code? Many thanks in advance.

Tianxiao Yang



_________________________________________________________________
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From chemistry-request@server.ccl.net Thu Aug 16 06:42:37 2001
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From: "Zhenhua Li" <lbbg123@etang.com>
To: "CCL" <chemistry@ccl.net>
Subject: Summery: g98 error on linux
Date: Thu, 16 Aug 2001 18:41:50 +0800
Organization: Chem. Dept. Fudan Univ. Shanghai, China
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Sorry, I forgot to mention Dr. Aeint de Boer in my previous summary. Here
are his suggestions:

You want to do something like:

# Set shared object library path

  setenv g98root         /u/local/apps/gaussian98.A.9
  setenv LD_LIBRARY_PATH $g98root/g98

to enable Linux to find the g98 shared object library, util.so.
If you are running in parallel, you need to do this on the parallel
nodes also.

OOPS.  My mistake.  I see (using the nm command) that util.so references
fstat, but does not define it.

fstat is probably defined in one of the several variations of libc.a.
You could try setting either LD_LIBRARY_PATH or LIBPATH to either /lib
or /usr/lib.  Actually, I would set both variables to both directories.
If that should work, then you can figure out which is/are needed.  If
that doesn't work, I'm running short of ideas.

Gaussian, Inc. uses the Portland Group compilers for Gaussian 98.  If
you have the Portland Group compilers, you could try compiling a short
program that uses I/O and try to figure out where fstat is resolved.
I believe that fstat will be used by most any program that uses I/O.





From chemistry-request@server.ccl.net Thu Aug 16 06:33:51 2001
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From: "Zhenhua Li" <lbbg123@etang.com>
To: "CCL" <chemistry@ccl.net>
References: <006e01c123f3$eace53a0$c40b140a@lizhenhua>
Subject: Summery: g98 error on linux
Date: Thu, 16 Aug 2001 18:33:30 +0800
Organization: Chem. Dept. Fudan Univ. Shanghai, China
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Hi, Dear Listers,

Several days ago, I posted a qustion about g98 on Redhat 7.1:

>   I compile g98 on Redhat 7.1 with pgf77 version 3.1 and get following
warnings:
util.so: the use of `tmpnam' is dangerous, better use `mkstemp'
/home/scratch/test/pgi/linux86/lib/libpgftnrtl.a(cnfg.o): In function
`__fio_scratch_name':
cnfg.o(.text+0x33): the use of `tempnam' is dangerous, better use `mkstemp'.

The compilation finished anyway, but when I ran g98,
following error appeared:

g98: error while loading shared libraries: /home/scratch/test/g98/util.so:
undefined symbol: fstat
Nothing appeared in output file at all.
>

    I received several warm replies from Dr. Doug Fox, Dr. Darko Babic,
Prof. Brian Duke. My problems are solved following Dr. Darko Babic's
suggestions by replacing the old version of optimized blas library (1.2)
with the latest 1.3e. G98 can run after the first complaining about obsolete
function "tmpnam" is resovled. Upgrading the pgf77 compiler with the latest
version 3.2-4 can resolve the second complaining about obsolete function
"tempnam". But upgrading compiler only can't solve the problem.
    I don't know if there will be any error without upgrading the compiler
(leaving only the second complaining).

Zhenhua


Here are replies from Dr. Doug Fox and Dr. Darko Babic:

> From Dr. Darko Babic:

Doug Fox is right, but it turned out (in my case) that the report-
ed problem was related to something else.  It mighth be the linker bug
which (perhaps) did not link fstat correctly after having a 'problem'
with obsolete functions (tmpname and tempnam, or so something).  Anyway,

1) check your installation (compilation) log file if there are some
warnings on using some obsolete functions.  If you have not compilation
log, reinstall with saving output (in csh: bsd/bldg98 >& bldg98.log &, or
in bash: bsd/bldg98 >bldg98.log 2>&1 &) and then check the log-file.

2) if you find such warnings in the log-file, you might have the same
problem as me, go to step 3.  If not, sorry, I cannot help you.

3) check whether you use optimized blas libraries and blas-f2c.  One
source of problems is blas-f2c.  The easiest way (but maybe not the
best in general) is not to use optimized blas.

4) if you're using PGI compiler with pgf77 version 3.1-3 (check it
by issuing pgf77 -V), you might have another call to obsolete function
> from PGI libraries.  Upgrade the compiler, if you can.  If you can't,
the easiest remedy is to copy the G98 files from the installation
done under RedHat6.2.  In that case, the SMP jobs might occasionally
die, and if so, contact me again.

> From Dr. Doug Fox:

   fstat is a standard system utility and should be resolved out of runtime
libraries provided with RedHat.  This error suggests RedHat has either
a) made very substantial changes to the structure of these libraries or
b) you omitted some of the runtime library packages when you installed
Linux.

   This lives in libc on my 6.2 machine so check to see if you have an
older version of libc you can install.






From chemistry-request@server.ccl.net Thu Aug 16 02:41:31 2001
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From: pineda@imb-jena.de (Felipe Pineda)
Message-Id: <10108160841.ZM74179@lancelot.imb-jena.de>
Date: Thu, 16 Aug 2001 08:41:29 +0000
In-Reply-To: Robert.Guenther@ch.tum.de
        "CCL:Superimpose/Superposition cyclic peptides" (Aug 15,  7:53pm)
References: <200108151753.TAA99443@xaver.org.chemie.tu-muenchen.de>
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Robert,

i think commercial s/w packages like insightII or sybyl, you might have access
to, would do that. in the worst case, by picking the atom pairs you would like
to superimpose on each other. then, you can edit the script for repeated use or
for modifications. i'm sure free academic modeling s/w like vmd, moilview and
all the others would do that, as well. maybe some scripting could be necessary.
for such kind of superpositions we use to take home made pieces of fortran
code.

hope it helps

best regards

felipe

-- 
**********************************************************************
* Felipe Pineda,PhD                                                  *
* Institut fuer Molekulare Biotechnologie                            *
* AG Theoretische Biophysik                                          *
* Beutenbergstrasse 11, Jena                Vox: +49-3641-65-6491    *
* Postfach 100 813, D-07708 Jena, Germany   Fax:            -6495    *
*                  web:  www.imb-jena.de/~pineda                     *
**********************************************************************
**********************************************************************
* DISCLAIMER: Unless indicated otherwise, everything in this note is *      
* my personal opinion, not an official statement of my employer      *      
**********************************************************************


From chemistry-request@server.ccl.net Thu Aug 16 04:20:54 2001
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Date: Thu, 16 Aug 2001 09:10:39 +0100
From: "Van Dam, HJJ (Huub)" <h.j.j.vandam@dl.ac.uk>
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The problem discussed here is typical for some issues related to DFT
calculations: How do you know what a program actually calculates when
you ask for a certain functional (e.g. B3LYP). This problem can be
tackled by collecting highly accurate reference data, complete
mathematical definitions of the functionals, and finally actual
implementations of functionals. We have now a collection of  functionals
and associated data available online at

    http://www.dl.ac.uk/DFTlib

With respect to the B3LYP question we agree with Christoph van Wuellen
that the Gaussian implementation is the right one because they
'invented' it. An implementation and associated reference data of the
functional equivalent to the one in Gaussian is given on our website.
The reference to Stephens et al. (1994) is the original reference to
B3LYP, the confusion around the VWN part was later clearified by Hertwig
and Koch (1997). The findings of Hertwig and Koch are reflected in the
Gaussian online technical documentation (Frisch et al., 1998).

Huub van Dam.

> 1.) Gaussian VWN functional uses the parameters given in *table* 3 of
> the VWN paper. These parameters approximate the RPA results, not the
> Monte-Carlo results! These parameters are used for the closed-shell
and
> completely spin-polarized (only alpha spin electrons) cases.
>
> 2.) Gaussian VWN does not use the RPA spin stiffness parameters to
inter-
> polate between these two cases, but uses the interpolation valid for
the
> exchange energy of a uniform electron gas. (I do not know what
happened that
> they chose this option).
>
> With the TZ basis sets of Ahlrichs and Schafer you should get the
following
> energies
>
> Atom:   He(ground state)   He(1s2s Triplet)      N Atom(Quartet)
>
> HF       -2.85989543        -1.79100228           -54.40232895
> LDA3     -2.86994363        -1.77391426           -54.26495985
> LDA5     -2.83256107        -1.73613023           -54.13356852
> BLYP     -2.90460692        -1.79477978           -54.58993091
> B3LYP    -2.91302754        -1.80220154           -54.60420134
>
> Things to note:
> (1) open shell calculations done spin-unrestricted. Hartree-Fock
results
>      given for comparison (if they do not agree, something is wrong
with
>      the basis set).
> (2) The three examples cover the three cases (spin-unpolarized,
completely
>      spin-polarized, partially spin-polarized) mentioned above (the
inter-
>      polation problem only shows up for the N atom).
> (3) LDA3 = the LDA functional implemented in Gaussian
>      LDA5 = the LDA functional used by the rest of us (i.e. SVWN5 in
G98)
> (4) B3LYP contains LDA3 (I guess this is the right choice, since B3LYP
was
>      'invented' by the Gaussian developers).
> (5) I implemented these functionals in my own program and got the same

>      results, the only way to *really* know what is implemented in
G98.
> (6) I suggest that my numbers are checked by others, so that our
community
>      knowns which functional is which. Please use highly accurate
numerical
>      grids. If the reference numbers should be obtained with another
basis
>      set, please make a suggestion.

--

========================================================================

Huub van Dam                               E-mail: h.j.j.vandam@dl.ac.uk
CCLRC Daresbury Laboratory                  phone: +44-1925-603362
Daresbury, Warrington                         fax: +44-1925-603634
Cheshire, UK
WA4 4AD

========================================================================





From chemistry-request@server.ccl.net Thu Aug 16 10:34:14 2001
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Subject: Re: CCL:ab initio MD code
To: chemistry@ccl.net (CCL)
Date: Thu, 16 Aug 2001 15:34:12 +0100 (BST)
In-Reply-To: <F82ZBNCogiwHsqhA53Z0000cdd5@hotmail.com> from "tianxiao young" at Aug 16, 2001 05:01:54 AM
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Hi Tianxiao,
  
> Do you know any released first principle molecular dynamical calculation 
> code? Many thanks in advance.

Have a look at NWChem (http://www.emsl.pnl.gov:2080/docs/nwchem/nwchem.html).

NWChem allows "Quantum molecular dynamics simulation by using any of the 
quantum mechanical methods capable of returning gradients". 

Tanja
-- 
  =====================================================================
     Tanja van Mourik                                                
     Royal Society University Research Fellow
     Chemistry Department 
     University College London    phone:    +44 (0)20-7679-4663      
     20 Gordon Street             e-mail:   work: T.vanMourik@ucl.ac.uk 
     London WC1H 0AJ, UK                    home: tanja@netcomuk.co.uk     

     http://www.chem.ucl.ac.uk/people/vanmourik/index.html
  =====================================================================

From chemistry-request@server.ccl.net Thu Aug 16 10:36:35 2001
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To: Keith.Refson@earth.ox.ac.uk
CC: chemistry@ccl.net
In-reply-to: <15226.34400.843223.871821@gargle.gargle.HOWL> (message from
	Keith Refson on Wed, 15 Aug 2001 15:25:36 +0100)
Subject: Re: CCL:Potential parameter fitting
References:  <15226.34400.843223.871821@gargle.gargle.HOWL>

> Does anyone there know of any software which is able to do this in a
> reasonably flexible manner?  I'm hoping for something simpler and more
> flexible than the old "roll your own energy and derivative routine"
> for plugging into a general least-squares fit program.  I'm sure this
> wheel must have been invented many times....

You could try the least-squares module in Scientific Python, available
> from http://dirac.cnrs-orleans.fr/programs/scientific.html. It is a
general non-linear least-squares routine using the Levenberg-Marquardt
algorithm, but also automatic derivatives. You still have to write
the energy function yourself, but not the derivatives.
-- 
-------------------------------------------------------------------------------
Konrad Hinsen                            | E-Mail: hinsen@cnrs-orleans.fr
Centre de Biophysique Moleculaire (CNRS) | Tel.: +33-2.38.25.56.24
Rue Charles Sadron                       | Fax:  +33-2.38.63.15.17
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From chemistry-request@server.ccl.net Thu Aug 16 09:45:01 2001
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Hello,
Using MM3 with Tinker, I'd like to study the complex formation energies
between calix[n]arenes and various guest molecules in an
attempt to correlate them with quartz microbalance sensor effect.
I have first tried to reproduce  results found in Mikrochim. Acta 119,
55-62 (1995) obtained using Hyperchem 3.0 MM3 but
 MM3 complex formation energies I obtained with Tinker do not agree at
all with those reported by the authors using Hyperchem.
I've tried two different types of atoms to describe aromatic carbons :
type 2  ( sp2 carbon) and 50 (sp2 aromatic carbon)
those two types give approximatively the same complex formation energies
as the non bonding parameters are the same
thus, I'd like to know if MM3 non bonding parameters for hyperchems are
the same as the ones inplemented in Tinker.

Thank you

Yohann Moreau




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Dear CCLers:

One of my colleaque raised following problem:
For a five-atom centrosymmetric linear molecule (D.infinte.h symmetry)
in its neutral form (closed shell), 4 Sigma and 3 Pi vibrational modes
could be obtained with G98 with no difficulties. For the -1 anion of the
molecule ( has the same symmetry, but open shell),  supposedly it should
have same vibrational modes. However, with G98 (also Jaguar) the
symmetries of some vibrational  modes cannot be determined, and there
are no degenerate frequencies for Pi modes. With GAMESS, if the D4h
symmetry  is used, the symmetries of the modes can be determined
correctly but it results in a few imaginary frequencies.
We'd like to hear opions and solutions about the problem from your!

Thanks!

Frank

--
 Xiaofeng Frank Duan, Ph.D         |  Phone: 937-904-8307
 ASC MSRC                          |  Email: duanx@asc.hpc.mil
 2435 5th St., ASC/HP Bldg. 676    |  URL:   http://www.asc.hpc.mil
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&nbsp;
<br>Dear CCLers:
<p>One of my colleaque raised following problem:
<br>For a five-atom centrosymmetric linear molecule (D.infinte.h symmetry)
in its neutral form (closed shell), 4 Sigma and 3 Pi vibrational modes
could be obtained with G98 with no difficulties. For the -1 anion of the
molecule ( has the same symmetry, but open shell),&nbsp; supposedly it
should have same vibrational modes. However, with G98 (also Jaguar) the
symmetries of some vibrational&nbsp; modes cannot be determined, and there
are no degenerate frequencies for Pi modes. With GAMESS, if the D4h symmetry&nbsp;
is used, the symmetries of the modes can be determined correctly but it
results in a few imaginary frequencies.
<br>We'd like to hear opions and solutions about the problem from your!
<p>Thanks!
<p>Frank
<pre>--&nbsp;
&nbsp;Xiaofeng Frank Duan, Ph.D&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; Phone: 937-904-8307
&nbsp;ASC MSRC&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; Email: duanx@asc.hpc.mil&nbsp;&nbsp;&nbsp;
&nbsp;2435 5th St., ASC/HP Bldg. 676&nbsp;&nbsp;&nbsp; |&nbsp; URL:&nbsp;&nbsp; <a href="http://www.asc.hpc.mil">http://www.asc.hpc.mil
</a>&nbsp;Wright-Patterson AFB, OH 45433&nbsp;&nbsp;&nbsp; |</pre>
&nbsp;
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From chemistry-request@server.ccl.net Thu Aug 16 10:00:23 2001
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Reply-To: "Mark A. Thompson" <markt158@home.com>
From: "Mark A. Thompson" <markt158@home.com>
To: <chemistry@ccl.net>
Subject: Gaussian Cube file format
Date: Thu, 16 Aug 2001 07:00:34 -0700
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I'd like to obtain the specifications for the format of Gaussian cube =
files. =20
I don't own a copy of the program nor do I have easy access to the =
technical manuals.
Can anyone point me in the right direction?

Thanks in advance,
Mark Thompson




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<DIV><FONT face=3D"Comic Sans MS" size=3D2>I'd like to obtain the =
specifications for=20
the format of Gaussian cube files.&nbsp; </FONT></DIV>
<DIV><FONT face=3D"Comic Sans MS" size=3D2>I don't own a copy of the =
program nor do=20
I have easy access to the technical manuals.</FONT></DIV>
<DIV><FONT face=3D"Comic Sans MS" size=3D2>Can anyone point me in the =
right=20
direction?</FONT></DIV>
<DIV><FONT face=3D"Comic Sans MS" size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Comic Sans MS" size=3D2>Thanks in =
advance,</FONT></DIV>
<DIV><FONT face=3D"Comic Sans MS" size=3D2>Mark Thompson</FONT></DIV>
<DIV>&nbsp;</DIV>
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From chemistry-request@server.ccl.net Thu Aug 16 11:36:44 2001
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Subject: GRID Conference URL
To: CHEMISTRY@ccl.net
From: "Mark Zottola - Contractor" <mzottola@arl.army.mil>
Date: Thu, 16 Aug 2001 11:35:43 -0400
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Dear List members,

The Computational Chemistry GRID conference was advertised on this list
Tuesday.  Unfortunately, the link to the information on the conference and
to the registration pages somehow broke.

If you are interested in attending or submitting a poster/paper to this
conference, the following URL will work :

http://www.sura.org/events/2001/compchem/chemistry.html

The organizers regret any inconvenience the broken link may have caused.


************************************************
Dr. Mark A. Zottola
PET Director of Computational Chemistry and Materials
Army Research Laboratory MSRC
1201 Technology Drive Suite 206
Aberdeen  MD 21001
VOICE: 410 278 7250     FAX: 410 297 9521




