From chemistry-request@www.ccl.net  Fri Feb 19 04:41:25 1999
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To: Wolfram Koch <kochw@argon.chem.tu-berlin.de>
Cc: CHEMISTRY@www.ccl.net
Subject: Re: CCL:basis sets for NMR in KS-DFT 
In-Reply-To: Your message of "Thu, 18 Feb 1999 18:09:17 +0100."
             <9902181709.AA26393@argon.chem.tu-berlin.de> 
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Date: Fri, 19 Feb 1999 10:41:18 +0100
From: Oliver Kohlbacher <oliver@mpi-sb.mpg.de>


> is anyone aware of a systematic study exploring the
> basis set dependence of NMR chemical shift calculations
> (or of other magnetic properties, such as ESR g-tensors)
> in the context of DFT? Is there a consensus of what kind
> of basis set (size of valence space, polarization, diffuse
> functions) is appropriate?

I have two papers in mind, one quite recently which is only dedicated to DFT:
  Buehl, Kaupp, Malkina, Malkin: J. Comput. Chem., 20, 91-105(1999)

and another comparing DFT/HF and differnt methods (GIAO/CSGT):
  Chesseman, Trucks, Keith, Frisch: J. Chem. Phys., 104, 5497(1996)

Regards,
  Oliver


----
 Oliver Kohlbacher   (oliver@mpi-sb.mpg.de)
 Max-Planck-Institut fuer Informatik, Im Stadtwald, 66121 Saarbruecken
 Tel.: 0681-9325-505 Fax: 0681-9325-199



From chemistry-request@www.ccl.net  Fri Feb 19 07:24:12 1999
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From: Frank Schaper <hein@dg7.chemie.uni-konstanz.de>
To: CHEMISTRY@www.ccl.net
Subject: ZINDO/S parameters for Zr and Cl
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Dear CCLer's:

Does anybody know the parameters for ZINDO/S (Zerner's INDO/S)
for Zr and Cl ? The implementation in Hyperchem as well as the literature
I am aware of, have Zr and Cl parameters only optimized for geometry
optimization (ZINDO/1), but not for spectroscopy.

Or would anyone suggest a different semi-empirical method for the
caculation of electronic spectra of metallocenes ?

Thanks,

Summary of replies as usual !


Hein



-------------------------------------------------------------
Frank Schaper   -   Universitaet Konstanz

e-mail : Frank.Schaper@uni-konstanz.de
         Frank@Schaper.com
s-mail : F. Schaper - Fakultaet fuer Chemie - Universitaet Konstanz
         D-78434 Konstanz - Germany 


From chemistry-request@www.ccl.net  Fri Feb 19 14:57:20 1999
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Dear Colleagues,

I am reviewing different techniques to compute excited states at an ab
initio
level for some possible future applications. Someone mentioned to me the
SAC-CI code. Can anyone point to me a good reference(s) describing this
method?

If somebody has an actual program and applys it as "user", I would
appreciate
if he/she could provide a brief summary of how good are results and how 
program works.

Thank you in advance,

Anatoli Korkin

From chemistry-request@www.ccl.net  Fri Feb 19 16:32:32 1999
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Date: Fri, 19 Feb 1999 14:35:56 -0600
To: CHEMISTRY@www.ccl.net (CCL)
From: schrecke@t12.lanl.gov (Georg Schreckenbach)
Subject: orbital and state symmetries in G94/98


Dear all,

while running a DFT single point on a symmetric (D4h) molecule
using Gaussian98, I get the message that the program is unable to
determine the symmetry of some orbitals, and consequently of the
electronic state. This is problematic since I try to calculate excited
states, and if the MO symmetries are unknown, then so are the
excited state symmetries.

Is there a reason for this behavior? Is there a way to make the program
find the appropriate symmetry labels for the orbitals? -- I tried already
SCF=(IntRep,Tight) but it had no effect.

Thank you very much! -- I'll summarize if there is any interest.

Best regards, Georg

--
Dr. Georg Schreckenbach           Tel:     (USA)-505-667 7605
Theoretical Chemistry T-12        FAX:     (USA)-505-665 3909
M.S. B268, Los Alamos National      E-mail:  schrecke@t12.lanl.gov
Laboratory, Los Alamos, New Mexico, 87545, USA
Internet:    http://www.t12.lanl.gov/~schrecke/



From chemistry-request@www.ccl.net  Thu Feb 18 06:55:41 1999
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From: Jochen Kuepper <jochen@uni-duesseldorf.de>
Organization: Heinrich-Heine-Universitaet
To: ep7@dent.okayama-u.ac.jp (masamura), CHEMISTRY@www.ccl.net
Subject: Re: CCL:HYDROGEN BOND
Date: Thu, 18 Feb 1999 12:51:37 +0100
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On Don, 18 Feb 1999 masamura wrote:

>        I have received the following replay for hydrogen bond.  I thank
>them for their kindness.

One point I missed in the summary:

You should look at the papers by Hobza and Schlag and also Hobza and Brutschi
regarding the concept of Anti H-bonding, describing the H-bonding like
interactions between pi-clouds and H-R molecules that do show opposite results
as standard H-bonds, i.e. shortened R-H bond, blue shifted vibrational
freuencies, ... .

Greetings,
Jochen
-----------------------------------------------------------------------
  Jochen Küpper

  Heinrich-Heine-Universität Düsseldorf     jochen@uni-duesseldorf.de
  Institut für Physikalische Chemie I
  Universitätsstr. 1, Geb 26.43 Raum 02.29     phone ++49-211-8113681
  40225 Düsseldorf                             fax   ++49-211-8115195
  Germany             http://www-public.rz.uni-duesseldorf.de/~jochen
-----------------------------------------------------------------------


