From Steven.Creve@chem.kuleuven.ac.be  Fri Feb 28 08:26:08 1997
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Date: Fri, 28 Feb 1997 14:18:19 +0100 (NFT)
From: Steven Creve <Steven.Creve@chem.kuleuven.ac.be>
To: Computational Chemistry List <chemistry@www.ccl.net>
Subject: CCL:G94: calcall BUG !
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Hi,

Has anyone ever come across this apparent bug in G94? :
(I use IBM-RS6000-G94RevC.3)

The frequencies in the output differ between "opt=calcall" and "freq".
A small calculation on H2O makes this clear:
using the following input:

--------------------------------------
$RunGauss
%chk=h2o
%mem=3500000
# HF/3-21G**TEST  OPT=calcall FREQ

TEST

0 1
O
h  1  r1
h  1  r2   2   a1

r1   0.95
r2   0.96
a1   105.9
-------------------------------------

I get in the first part - the calcall - even an imaginary frequency.
The second part of the output (the freq part) gives the right frequencies.
Zero-point energies differ by 100% !

I don't know if this is a known bug in G94.



--------------------------------------------------------------------------
Steven Creve                       steven.creve@chem.kuleuven.ac.be
Labo Quantumchemie
Celestijnenlaan 200F
3001-HEVERLEE                      tel: (32) (16) 32 73 93
BELGIUM                            fax: (32) (16) 32 79 92


From Jennie.Weston@org.chemie.uni-giessen.de  Fri Feb 28 08:45:26 1997
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From: Jennie.Weston@org.chemie.uni-giessen.de (Jennie Weston)
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Subject: ecp format 
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Hello Everybody,

Maybe somebody out there can help me... I happen to need an effective
core potential for potassium - in Gaussian 94 format. SO i looked in 
the Stuttgart ecp library. Here's what i found:

K ECP ECP10MWB: 10 4 0 20
Q=9., MEFIT, WB, A: Bergner, Arbeitsbericht 1990.
1 2 1.000000 0.000000
1 2 6.843807 92.252639
1 2 4.217857 23.498035
1 2 6.497537 -7.315420
1 2 6.123613 -3.858320
K s ECP10MWB : 7 1 1.3
(7s6p)/[5s4p]-Basissatz fuer PP von A. Bergner, Arbeitsbericht 1990.
 8.223362  3.797211  1.331607 0.666282
 0.272807  0.037092  0.016543
 0.104145 -0.439158  0.052191
K p ECP10MWB : 6 1 1.3
(7s6p)/[5s4p]-Basissatz fuer PP von A. Bergner, Arbeitsbericht 1990.
21.605670 1.100212 0.504345 0.317869
 0.148150 0.022139
-0.011737 -0.407675 -0.333292
***********************************

As i am a complete newbie in the field of ecp calculations, i could really
use some help translating these numbers into an input file for gaussian94. 
I need to be able to read the ecp and accompanying basis set in with the
GEN keyword.  Could some guru out there take 10 min of time and help?
This would REALLY be appreciated.  
Reply to Jennie.Weston@org.chemie.uni-giessen.de 
to save ccl bandwidth for this very specific problem. If anybody else is
interested in the results, give me an email jingle.

Thanks a bunch,

Jennie Weston

Here's what i have so far:

-----input specification, then start basis set

K 0
S       3       1.00
0.8223362D+01    0.104145D+00
0.3797211D+01   -0.439158D+00
0.1331607D+01    0.52191D-01
S       1       1.00
0.666282D+00     0.1000000D+01
S       1       1.00
0.272807D+00     0.1000000D+01 
S       1       1.00
0.370920D-01     0.1000000D+01 
S       1       1.00
0.16543D-01      0.1000000D+01
P       3       1.00
0.21605670D+02  -0.117370D-01
0.1100212D+01   -0.407675D+00
0.504345D+00    -0.333292D+00
P       1       1.00
0.317869D+00     0.1000000D+01 
P       1       1.00
0.148150D+00     0.1000000D+01
P       1       1.00
0.221390D-01     0.1000000D+01
****

is this right so far?.....and then i get stuck with the ecp block.

Here is the (very minimal) explanations provided by the Stuttgart 
library in conjunction with these numbers:

Library keywords are of the form ECPnXY; n is the number of core electrons
which are replaced by the pseudopotential, X denotes the reference system
used for generating the pseudopot (X=S: single-valence-electron ion; X=M:
neutral atom), and Y stands for the theoretical level of the reference 
data (Y=HF: Hartree-Fock; Y=WB: quasi-relativistic; Y=DF: relativistic).
For one- or two-valence electron atoms SDF is a good choice, while otherwise
MWB (or MDF) is recommended.  The same keyword applies to the set of pseudopot
parameters and the corresponding optimized valence basis sets.

For each pseudopot, the keyword is immediately followed by 4 parameters:
the number of core electrons, the number of l-projectors (lmax), a zero
for scalar-relativistic ECP's, and the total number of parameters listed below
the commentary line. The latter parameters provide information on V(lmax) 
first, and then for the semi-local V(l) in the order l=0,1,2,.., lmax-1.
For each l, the number of terms of the form A(i)*r**(n(i)-2)*exp(a(i)*r**2)
is given first, and then the parameters specifying the individual terms
in the sequence n(1),a(a),A(1);n(2)a(2),A(2);....

For each valence basis set of a specified symmetry (s, p, d, ...), the
number of exponents is specified first, then the number of recommended
contractions and the contraction patterns (n.m defines the range of 
primitives to be contracted). On the following lines, the exponents of
the primitives are given first, and afterwards the sets of contraction
coefficients.

---end of library explanations----




From tajkhors@mbp-sgi7.inet.dkfz-heidelberg.de  Fri Feb 28 11:26:19 1997
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From: "Emadeddin Tajkhorshid" <tajkhors@mbp-sgi7.inet.dkfz-heidelberg.de>
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Date: Fri, 28 Feb 1997 17:12:49 +0100
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To: chemistry@www.ccl.net (Computational Chemistry List)
Subject: Double bond rotation
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Dear CCLers

I wonder to know about any reference of experimentally measured or
theoretically calculated values for the rotation around a double bond. Although
any source of data is highly appreciated, my special interest is about the
rotational barriers in neutral and charged polyene structures.

Thanx in advance

-- 
Emad
*********************************************************************
E. Tajkhorshid				
German Cancer Research Center; DKFZ  Tel: +49 6221 42 2339
Dept. Molecular Biophysics (0810)    FAX: +49 6221 42 2333
P.O.Box 101949			   Email: E.Tajkhorshid@DKFZ-Heidelberg.de
69009 Heidelberg, FRG
***********************************************************************
* "Never express yourself more clearly than you think."   -Niels Bohr *
***********************************************************************

From plin@chemvx.tamu.edu  Fri Feb 28 16:26:12 1997
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Date: Fri, 28 Feb 1997 14:46:44 -0600
From: Lin Ping <plin@chemvx.tamu.edu>
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Dear CCLers, 

I want to use ECP in Gaussian 94 for (ZrO2)4
I tried the LanL2DZ. But what I got is a serials of "
 No unpruned grid is available for this atom.
 No unpruned grid is available for this atom.
 No unpruned grid is available for this atom.
 No unpruned grid is available for this atom.
"
Does anyone met this kind of problem before? Or can you tell me what is
happening and how to correct it?

Thanks,

LIN Ping

-- 
Department of Chemistry           Phone No. : 409-268-2666
Texas A&M University              E-mail : plin@chemvx.tamu.edu 
College Station TX 77843-3255              plin@warbird.chem.tamu.edu
URL: http://http.tamu.edu/~p0l1112/

