From chemistry-request@www.ccl.net  Thu Apr  1 04:05:57 1999
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From: Wibke Sudholt <wibke@theochem.uni-duesseldorf.de>
To: chemistry@www.ccl.net
Subject: Calculation exercises wanted
Date: Thu, 1 Apr 1999 10:13:37 +0200
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Dear CCLers,

in the summer semester I have to supervise a group of students interested in
advanced methods of quantum chemistry. The focus is on the theoretical
foundation and background of methods including electron correlation, NOT on
their practical application. The course will consist of lectures (hold by the
professor) and training units (hold by me). Since I do this for the first time
and the training course was not held here in the same form before, I am
interested in good books and internet pages (or everything else) with
collections of calculation exercises (and solutions for the superviser, of
course :-) ) concerning the following topics:
- unrestricted Hartree-Fock
- configuration interaction
- Moeller-Plesset perturbation theory
- coupled-cluster methods
- density functional theory
Can somebody out there help me? Thank you very much in advance!

Best regards

Dipl.-Chem. Wibke Sudholt
Institute of Theoretical Chemistry
Heinrich-Heine-University
Duesseldorf, Germany
wibke@theochem.uni-duesseldorf.de

From chemistry-request@www.ccl.net  Thu Apr  1 04:20:48 1999
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Subject: Re: CCL:M:mopac solid state
Date: Thu, 1 Apr 1999 17:19:09 +0800
x-mailer: Claris Emailer 2.0v3, January 22, 1998
From: Andrew Rohl <andrew@power.curtin.edu.au>
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>In the  mopac manual refers that for solid state calculations, there
>is a solid state version of the program called MOSOL.
>Does anybody know anything about the MOSOL (its capabilities) and
>how one can obtain it?
>
I do know that julian gale at imperial college (j.gale@ic.ac.uk) has 
incorporated this functionality into his gulp program...

  Andrew

--------------------------------------------------------------------------
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School of Applied Chemistry              Phone: +61 8 9266 7317 (Office)
Curtin University of Technology                 +61 8 9266 3780 (Lab)
PO Box U 1987                            FAX:   +61 8 9266 2300
Perth, 6845
WESTERN AUSTRALIA

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From chemistry-request@www.ccl.net  Thu Apr  1 07:33:31 1999
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To: chemistry@www.ccl.net
Subject: Calculation exercises wanted - more precise version
Date: Thu, 1 Apr 1999 13:23:21 +0200
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Hello CCLers again,

>from some of the first answers I got (Many thanks to all who answered so
quickly - I am overwhelmed!), I see that I was possibly not precise enough in
my first e-mail: What I am really looking for are paper-and-pencil exercises,
NOT computer exercises. The students have a basic knowledge in quantum
chemistry (Hartee-Fock etc.), so I am interested in exercises about the
mentioned more "advanced" topics. Sorry for any confusion! Hopefully, this does
not prevent anybody from answering to my question. Since a lot of people asked
for this, I will summerize in the CCL.

Again many thanks for any help!

Dipl.-Chem. Wibke Sudholt
Institute of Theoretical Chemistry
Heinrich-Heine-University
Duesseldorf, Germany
wibke@theochem.uni-duesseldorf.de


On Thu, 1 Apr 1999 (sorry, no April joke :-) ), I wrote:

> Dear CCLers,
> 
> in the summer semester I have to supervise a group of students interested in
> advanced methods of quantum chemistry. The focus is on the theoretical
> foundation and background of methods including electron correlation, NOT on
> their practical application. The course will consist of lectures (hold by the
> professor) and training units (hold by me). Since I do this for the first time
> and the training course was not held here in the same form before, I am
> interested in good books and internet pages (or everything else) with
> collections of calculation exercises (and solutions for the superviser, of
> course :-) ) concerning the following topics:
> - unrestricted Hartree-Fock
> - configuration interaction
> - Moeller-Plesset perturbation theory
> - coupled-cluster methods
> - density functional theory
> Can somebody out there help me? Thank you very much in advance!
> 
> Best regards
> 
> Dipl.-Chem. Wibke Sudholt
> Institute of Theoretical Chemistry
> Heinrich-Heine-University
> Duesseldorf, Germany
> wibke@theochem.uni-duesseldorf.de

From chemistry-request@www.ccl.net  Thu Apr  1 09:25:28 1999
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Date: Thu, 01 Apr 1999 17:31:18 +0300
From: Dima Danilov <dimdan@pgasa.dp.ua>
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Subject: Search of databases of constant Hammett and Taft
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Please,could you be so kind help me to find in Internet databases of
chemical constants Hammett and Taft and constants of speed of the
chemical reactions for any substances(compounds).
 Pridnieprovsk State Academy of Constraction and Architecture.
 Chemistry Department.
 Ukraine, Dnepropetrovsk.             With great respect Dima Danilov.

From chemistry-request@www.ccl.net  Thu Apr  1 09:43:34 1999
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To: "        -         (052)chemistry(a)www.ccl.net" <chemistry@www.ccl.net>
Subject: MOPAC calculation on radicals - summary
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In reply to my question:

> I'm interested in trying to model free radical alkene polymerisation reactions
> using MOPAC (AM1, PM3).  There appear to be two possibilities for calculations
> on radicals - the Dewar half-electron method (which is invoked by the keyword
> DOUBLET) and UHF.   The results differ by a few kcal/mol.
>
> Can anyone advise me which option is likely to give the best results for
> reaction thermodynamics and activation energies of a radical adding to a
> double bond?  I'd also be interested in any comments on bond dissciation
> energies estimated by these methods.  I'll summarise any replies.

I received one answer - thanks to Andy Holder at Semichem (andy@semichem.com):

"The third alternative is the best for your situation:  configuration
interaction (CI)>  The reason is that both UHF and DHE suffer from serious
inadequacies.  The DHE method simply isn't correct theoretically, although
it works marginally for doublets.  In the case of UHF in the current
semiempirical scheme, the results are not "spin pure" and have higher
multiplicities mixed in.  (You can tell this by looking at the S**2 value,
which is usually significantly different from the expected value.)  If the
two points you are trying to compare are not the same amount of "spin
impure" they are are not strictly comparable energetically.

"In contrast, CI results are "spin pure" and they also allow orbtal switching
during the course of a calculation on a reaction, as well as change in spin
state.

"MOPAC does have a CI module, but it is pretty limited and painfully slow.  I
suggest that AMPAC is a far better choice.  One of our collaborators is a CI
expert and our CI module is the fastest, most complete, and easiest to use of
anyone's."

Semichem will supply a demo of AMPAC on request.  Subsequent CI calculations
have
shown similar results to the half-electron heats of formation for my radicals.

Steve Rogers
(Steve_Rogers@ici.com)

From chemistry-request@www.ccl.net  Wed Mar 31 08:31:47 1999
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The latest issue of NetSci is available at http://www.netsci.org




From chemistry-request@www.ccl.net  Wed Mar 31 19:02:34 1999
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From: jackie jackson <jackie_jacky@yahoo.com>
Subject: error with newly-installed G98
To: chemistry@www.ccl.net



Hi, all,
I installed g98 on my SGI machine (running IRIX6.5.2) but it gave me the
error message which mentioned "segv (11), code 13, pc 0xd9d5804, vaddr
0x1062c210, alt-sp 0x10629e00" when I tried to run an optimization job.
Since nobody here could help me with this, I ask for your kindness to
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Jackie
Kinetics, Inc.
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From chemistry-request@www.ccl.net  Thu Apr  1 20:26:50 1999
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From: "Gustavo Moura" <gustavo@hathi.chem.pitt.edu>
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Date: Thu, 1 Apr 1999 20:26:46 -0500
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Subject: Summary: Upgrading to Fortran 90/95
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Dear CCL readers,
	last monday I posted the following question:
	"Can someone out there suggest a good book on upgrading to
Fortran 90/95 for someone with a reasonable knowledge of Fortran 77?
I am about to start writing a program and I would like to take
advantage of the new capabilities of Fortran 90/95. "
	Here you have a summary of the responses that I have received.
My thanks to Sven Bovin, Matt Wessel, Huub van Dam and Joao Brandao.
	Sincerely yours,
				Gustavo L.C. Moura
			 gustavo@hathi.chem.pitt.edu
x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x

>From Sven Bovin:

>There is a web page out there with -- IMHO -- a number of
>good texts for just that purpose:
>
> http://metalab.unc.edu/pub/languages/fortran/append-g.html
>
>The text I've used (and am using) is the `Manchester
>Fortran 90 for Fortran 77 programmers course'  It focusses
>mainly on the differences between FORTRAN 77 and Fortran 90
>and is freely available.
>
>I hope this is helpfull to you

>From Matt Wessel:

>I have the book Fortran 90 by Loren P. Meissner, published by PWS,
>Boston.  It's pretty good at getting you through the basics of FOrtran
>90, and has some 77 to 90 transition tips.  Hope this helps.

>From Huub van Dam:

>I think "Fortran 90 explained" by Metcalf is okay. Otherwise there
>is a list of books published by NAG at
>http://www.nag.co.uk/nagware/Fortran90/books.html how about "migrating
>to Fortran 90"?

>From Joao Brandao:

>I would recommend
>
>M. Metcalf and John Reid
>     FORTRAN 90/95 explained
>     Oxford Science Publications
>     ISBN 0-19-851888-9


From chemistry-request@www.ccl.net  Thu Apr  1 23:02:31 1999
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Date: Thu, 1 Apr 1999 22:22:55 +36000
From: Richard Wood <dmpc@hugh.chem.uic.edu>
To: Wibke Sudholt <wibke@theochem.uni-duesseldorf.de>
cc: chemistry@www.ccl.net, wibke@lithium.theochem.uni-duesseldorf.de
Subject: Re: CCL:Calculation exercises wanted
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Perhaps you could try the text book "Modern Quantum Chemistry" by Szabo 
and Ostlund.  It has a lot of pencil and paper problems/exercises in it.

Richard


