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Date: Mon, 16 Dec 2002 13:12:43 -0500
Subject: g98/cosmo (solvent=water) optimization of the anion
From: "Olga Dmitrenko" <odmitr@UDel.Edu>
To: chemistry@ccl.net
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Hi,
I am trying to optimize 1,2-dihydroxybenzoic acid carboxylate anion in water
at the b3lyp/6-31+g(d,p) level of theory using COSMO model for solvent.
When solvent was =THF, the optimization was complete without any
troubles. Unfortunately, the use of water makes optimization oscillating and
Maximum force is never less 0.016, but Maximum displacement and RMS are
zeros.

- I did increase: TSNUM=250
- I've used opt=gdiis and Iop(1/8=2)

One of my latest control cards looked like:
 #b3lyp/6-31+g(d,p) scrf=(cosmo,read,solvent=water) scf=tight scf(maxcy
 c=400) # IOp(1/8=2) OPT=(readFC,GDIIS) geom=check guess=read

Thus, I have two questions here:

1) Can anybody recommend me some other options within COSMO model (I do not
want
to change the solvent model since a series of calculations is already done)
to force finally the almost optimized anion optimization to converge.

2) Several times I've got at the end of output " Too many tesserae.
Increase the MxTs."
How I can increase the MxTs and what is it?

Any comments will be highly appreciated. Thanks in advance,

Olga
*******************************************
* Dr. Olga Dmitrenko                                            *
* Department of Chemistry and Biochemistry      *
* University of Delaware, Newark                         *
* Delaware 19716, USA                                       *
*******************************************

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<HTML>
<HEAD>
<TITLE>g98/cosmo (solvent=3Dwater) optimization of the anion</TITLE>
</HEAD>
<BODY BGCOLOR=3D"#FFFFFF">
<TT>Hi,<BR>
I am trying to optimize 1,2-dihydroxybenzoic acid carboxylate anion in wate=
r<BR>
at the b3lyp/6-31+g(d,p) level of theory using COSMO model for solvent.<BR>
When solvent was =3DTHF, the optimization was complete without any<BR>
troubles. Unfortunately, the use of water makes optimization oscillating an=
d<BR>
Maximum force is never less 0.016, but Maximum displacement and RMS are<BR>
zeros.<BR>
<BR>
- I did increase: TSNUM=3D250<BR>
- I've used opt=3Dgdiis and Iop(1/8=3D2)<BR>
<BR>
One of my latest control cards looked like:<BR>
&nbsp;#b3lyp/6-31+g(d,p) scrf=3D(cosmo,read,solvent=3Dwater) scf=3Dtight scf(maxc=
y<BR>
&nbsp;c=3D400) # IOp(1/8=3D2) OPT=3D(readFC,GDIIS) geom=3Dcheck guess=3Dread<BR>
<BR>
Thus, I have two questions here:<BR>
<BR>
1) Can anybody recommend me some other options within COSMO model (I do not=
<BR>
want<BR>
to change the solvent model since a series of calculations is already done)=
<BR>
to force finally the almost optimized anion optimization to converge.<BR>
<BR>
2) Several times I've got at the end of output &quot; Too many tesserae.<BR=
>
Increase the MxTs.&quot;<BR>
How I can increase the MxTs and what is it?<BR>
<BR>
Any comments will be highly appreciated. Thanks in advance,<BR>
<BR>
Olga<BR>
*******************************************<BR>
* Dr. Olga Dmitrenko &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*<BR>
* Department of Chemistry and Biochemistry &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*<=
BR>
* University of Delaware, Newark &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;*<BR>
* Delaware 19716, USA &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;*<BR>
*******************************************<BR>
</TT>
</BODY>
</HTML>

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From chemistry-request@server.ccl.net Mon Dec 16 18:09:32 2002
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Date: Mon, 16 Dec 2002 17:09:26 -0600
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Subject: BioCoRE Release: New Features
From: Robert Brunner <rbrunner@uiuc.edu>
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Urbana, Illinois - The Theoretical Biophysics Group at the University 
of Illinois is proud to announce the latest updates to the BioCoRE 
web-based collaborative research environment. Significant new features 
have been added, as well as many minor improvements and features 
suggested by our users. In addition, this release marks the first time 
that source code for the server is available. The BioCoRE server is 
available free of charge at 
http://www.ks.uiuc.edu/Research/biocore/localServer.

BioCoRE is a collaborative work environment for biomedical research, 
research management, and training. A resource-centered platform, 
BioCoRE offers scientists, working together or alone, a seamless 
interface to a broad range of local and remote technologies such as 
discipline-specific and general tools, and visualization solutions. In 
creating unprecedented proximity to colleagues' expertise and 
knowledge, BioCoRE empowers scientists everywhere, establishing equal 
access to research and training opportunities.

To harness and streamline collaborative capabilities across temporal 
and physical boundaries in research and training, BioCoRE builds on the 
transparent use of and communication between technological resources 
(hardware and software) and databases. BioCoRE features powerful yet 
easy-to-use tools, among them co-authoring papers and other documents, 
running applications on supercomputers, sharing molecular visualization 
over the Internet, notifying project team members of recent project 
changes by email, chatting, keeping a lab book, and many others.

BioCoRE Features:

     * Supercomputer Job Management: BioCoRE allows you to submit 
computational jobs to your supercomputer account at NCSA, PSC, and to 
other supercomputers using Globus via a web-based interface. After 
submitting jobs through BioCoRE, you may check back to see whether they 
have run, and view the output of the jobs as they run.
     * Shared Molecular Visualization: Using the popular visual 
molecular dynamics program VMD (with support for the recently released 
version 1.8), BioCoRE users can share interesting views of molecules 
with collaborators around the world.
     * Molecular Dynamics Simulation Config File Generator: BioCoRE 
includes a web-based graphical form that researchers can use to create 
input files for NAMD, a molecular dynamics simulation program that 
recently won the Gordon Bell award for high performance in parallel 
computing.
     * Notebook: Researchers have access to online notebooks for 
archiving communication, keeping journals, and capturing output of 
computer programs. In addition, researchers can share lists of relevant 
websites with their collaborators.
     * Shared filesystem: Scientists have access to a web-based shared 
filesystem that can be used to store important research files including 
documents being prepared for publication, PDF files, and more.
     * Secure Instant Messaging: Via the BioCoRE "Control Panel" 
researchers can discuss their work in a secure environment. The Control 
Panel is also used to notify researchers of other important events, 
such as when new views are published from VMD, entries are added to the 
Notebook, and collaborators log in and out.
     * and more!

In addition to accessing the above features at the online BioCoRE 
server in the Theoretical Biophysics Group, researchers can download 
and install their own BioCoRE server (available both in binary and 
source code form), for improved responsiveness and customizability.

For additional information, or to obtain a BioCoRE account, please 
visit the BioCoRE website at http://www.ks.uiuc.edu/Research/biocore/.

BioCoRE development is supported by the NIH National Center for 
Research Resources. The authors request that any published work which 
utilizes BioCoRE includes a reference to the BioCoRE webpage and/or the 
following reference:

BioCoRE: A collaboratory for structural biology. Milind Bhandarkar, 
Gila Budescu, William F. Humphrey, Jesus A. Izaguirre, Sergei Izrailev, 
Laxmikant V. Kale, Dorina Kosztin, Ferenc Molnar, James C. Phillips, 
and Klaus Schulten. In Agostino G. Bruzzone, Adelinde Uchrmacher, and 
Ernest H. Page, editors, Proceedings of the SCS International 
Conference on Web-Based Modeling and Simulation, pages 242-251, San 
Francisco, California, 1999.

The Theoretical Biophysics group encourages BioCoRE users to be closely 
involved in the development process through reporting bugs, 
contributing fixes, periodical surveys and via other means. Questions 
or comments may be directed to biocore@ks.uiuc.edu.

We are eager to hear from you, and thank you for using our software!



From chemistry-request@server.ccl.net Mon Dec 16 19:38:00 2002
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Date: Mon, 16 Dec 2002 16:38:00 -0800 (PST)
From: Ioana Cozmuta <ioana@nas.nasa.gov>
To: chemistry@ccl.net
Subject: question about solvation
Message-ID: <Pine.SOL.4.44.0212161637500.19609-100000@marcy.nas.nasa.gov>
MIME-Version: 1.0
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Hi,

I have a very basic question on which I would like to
have an answer from someone experienced who has a clear understanding.
I've looked it up in various books but

I have two sets of experimental data for oxygen and water vapor
permeabilities, respectively. The oxygen permeabilities are expressed in
cm^3*mm/m^2*day*atm while the water vapor in g*mm/m^2*day. If I use the
definition of permeability as being the product between the solubility and
the diffusion coefficient of the gas in a medium then I get that for
oxygen the solubility is expressed in cm^3/m^3*atm while for water vapor
it is expressed in g/m^3.
By definition the solubility is the limit, when pressure goes to zero, of
the ratio of the gas concentration versus its partial pressure (Henry's
law). Thus it should be expressed in
volume_of_gas(STP)/volume_of_matrix*partial pressure.

Is there usually a difference that is accounted for in experiments that I
am not aware of  and explains the different units for solubility?
Also what is the conceptual difference between Henry's constant and
solubility?

I am sorry if this question is trivial but it bothers me since a while and
I would like to have an expert chemist answer on this (my background is
not chemistry).

Thank you in advance,
Ioana


****************************************************************************
* Ioana Cozmuta                 *				           *
* NASA-AMES Research Center     *  "Gravitation can not be held responsible*
* Mail Stop 230-3               *  for people falling in love"		   *
* Moffet Field,CA 94035         *  					   *
* phone: (650) 604-0993         *                           Albert Einstein*
* fax:   (650) 604-0350         *                             (1879-1955)  *
****************************************************************************




From chemistry-request@server.ccl.net Sun Dec 15 22:24:42 2002
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Date: Sun, 15 Dec 2002 19:24:29 -0800 (PST)
From: Ioana Cozmuta <ioana@nas.nasa.gov>
To: chemistry@ccl.net
Subject: question about solvation
Message-ID: <Pine.SOL.4.44.0212151855240.4317-100000@marcy.nas.nasa.gov>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

Hi,

I have a very basic question on which I would like to
have an answer from someone experienced who has a clear understanding.
I've looked it up in various books but

I have two sets of experimental data for oxygen and water vapor
permeabilities, respectively. The oxygen permeabilities are expressed in
cm^3*mm/m^2*day*atm while the water vapor in g*mm/m^2*day. If I use the
definition of permeability as being the product between the solubility and
the diffusion coefficient of the gas in a medium then I get that for
oxygen the solubility is expressed in cm^3/m^3*atm while for water vapor
it is expressed in g/m^3.
By definition the solubility is the limit, when pressure goes to zero, of
the ratio of the gas concentration versus its partial pressure (Henry's
law). Thus it should be expressed in
volume_of_gas(STP)/volume_of_matrix*partial pressure.

Is there usually a difference that is accounted for in experiments that I
am not aware of  and explains the different units for solubility?
Also what is the conceptual difference between Henry's constant and
solubility?

I am sorry if this question is trivial but it bothers me since a while and
I would like to have an expert chemist answer on this (my background is
not chemistry).

Thank you in advance,
Ioana


****************************************************************************
* Ioana Cozmuta                 *				           *
* NASA-AMES Research Center     *  "Gravitation can not be held responsible*
* Mail Stop 230-3               *  for people falling in love"		   *
* Moffet Field,CA 94035         *  					   *
* phone: (650) 604-0993         *                           Albert Einstein*
* fax:   (650) 604-0350         *                             (1879-1955)  *
****************************************************************************



From chemistry-request@server.ccl.net Tue Dec 17 05:31:50 2002
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 chemistry@ccl.net; Tue, 17 Dec 2002 11:31:49 +0100 (MET)
Date: Tue, 17 Dec 2002 11:32:19 +0100
From: pop14848 <post@eike-huebner.de>
Subject: calculated IR frequencies
To: chemistry@ccl.net
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Hi,

can someone point me to a paper discussing calculated IR frequencies vs. experimental frequencies? I am not intersted in differences between DFT and HF/MP2 calculations but the general reasons of the overestimated IR-frequencies due to harmonic fundamentals instead of anharmonicity aswell as too short bond-length (in HF calcilations) etc.
In fact a paper not only disussion a mediate factor of about 0.9 but also discussing the difference of this factor from calculated frequence to frequence in one molecule would be perfekt (like 0.90 for one one normal mode, 0.93 for the next)

Thanks in advance

Eike Huebner


From chemistry-request@server.ccl.net Tue Dec 17 03:51:16 2002
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From: "Parthiban Srinivasan" <parthi.s@jubilantbiosys.com>
To: <chemistry@ccl.net>
Subject: Conversion of .mol file to .mm3 file
Date: Tue, 17 Dec 2002 14:18:16 +0530
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Dear Colleagues
What is the best way to convert the .mol file to .mm3 format (to be used =
in Tinker software).
When I used the Babel i found some error in terms of defining the atom =
types.=20
For example, for the molecule

                   __
           C---C=3D=3DN
           |
          C
             \
              C---O
               ||
               O


I converted the .mol file into .mm2 using Babel. I got the following =
output.

                                   Atom type

3.18330  -21.46250   0.00000    2(  1)
3.83290  -21.08750   0.00000    4(  2)
3.17920  -22.21250   0.00000    2(  3)
3.82500  -22.58750   0.00000    3(  4)
4.48120  -20.70980   0.00000   10(  5)
4.54580  -22.39170   0.00000    7(  6)
3.82080  -23.33750   0.00000    7(  7)

Atom Type Definitions in MM3

1        CSP3 alkane
2        CSP2 alkene
3        CSP2 Carbonyl
6        O in OH
7        O in Carbonyl
4        CSP Alkyne
10      NSP

As one would expect the two caron atoms (atom 1 and 3) to be of the type =
1 (CSP3 Alkane), the BABEL defines it as atom type 2 (CSP2 alkene).=20
Am I missing something in the above or is there any better way of =
converting the .mol file to .mm3 file.

I would appreciate your help. Thanks.

S Parthiban=20
Jubilant biosys

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	charset="iso-8859-1"
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content=3D"text/html; charset=3Diso-8859-1" =
http-equiv=3DContent-Type>
<META content=3D"MSHTML 5.00.2919.6307" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Dear Colleagues<BR>What is the best way =
to convert=20
the .mol file to .mm3 format (to be used in Tinker software).<BR>When I =
used the=20
Babel i found some error in terms of defining the atom types. <BR>For =
example,=20
for the molecule</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
__</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
C---C=3D=3DN<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;=20
|</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;C</F=
ONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;=20
\</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;=20
C---O</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;||</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;=20
O</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>I converted the .mol file into .mm2 =
using Babel. I=20
got the following output.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
Atom type</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>3.18330&nbsp; -21.46250&nbsp;&nbsp;=20
0.00000&nbsp;&nbsp;&nbsp; 2(&nbsp; 1)<BR>3.83290&nbsp; =
-21.08750&nbsp;&nbsp;=20
0.00000&nbsp;&nbsp;&nbsp; 4(&nbsp; 2)<BR>3.17920&nbsp; =
-22.21250&nbsp;&nbsp;=20
0.00000&nbsp;&nbsp;&nbsp; 2(&nbsp; 3)<BR>3.82500&nbsp; =
-22.58750&nbsp;&nbsp;=20
0.00000&nbsp;&nbsp;&nbsp; 3(&nbsp; 4)<BR>4.48120&nbsp; =
-20.70980&nbsp;&nbsp;=20
0.00000&nbsp;&nbsp; 10(&nbsp; 5)<BR>4.54580&nbsp; -22.39170&nbsp;&nbsp;=20
0.00000&nbsp;&nbsp;&nbsp; 7(&nbsp; 6)<BR>3.82080&nbsp; =
-23.33750&nbsp;&nbsp;=20
0.00000&nbsp;&nbsp;&nbsp; 7(&nbsp; 7)</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Atom Type Definitions in =
MM3</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial =
size=3D2>1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CSP3=20
alkane<BR>2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CSP2=20
alkene<BR>3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CSP2=20
Carbonyl<BR>6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;O in=20
OH<BR>7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;O in=20
Carbonyl<BR>4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CSP=20
Alkyne<BR>10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;NSP</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>As one would expect the two caron atoms =
(atom 1 and=20
3) to be of the type 1 (CSP3 Alkane), the BABEL defines it as atom type =
2 (CSP2=20
alkene). <BR>Am I missing something in the above or is there any better =
way of=20
converting the .mol file to .mm3 file.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>I would appreciate your help. =
Thanks.</FONT></DIV>
<DIV>&nbsp;</DIV>
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From chemistry-request@server.ccl.net Tue Dec 17 03:47:27 2002
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Ioana,

the difference just arises from the fact that water also has a well defined liquid phase. The notation using g/m^3 for
solubility of water implies using liquid water as reference. By using the vapor pressure of water (as a function of temperature)
you know the vapor phase which is in equilibrium with the liquid phase. Then you can convert it into a vapor density and treat
it similar to oxygen.

Andreas

Ioana Cozmuta schrieb:
> 
> Hi,
> 
> I have a very basic question on which I would like to
> have an answer from someone experienced who has a clear understanding.
> I've looked it up in various books but
> 
> I have two sets of experimental data for oxygen and water vapor
> permeabilities, respectively. The oxygen permeabilities are expressed in
> cm^3*mm/m^2*day*atm while the water vapor in g*mm/m^2*day. If I use the
> definition of permeability as being the product between the solubility and
> the diffusion coefficient of the gas in a medium then I get that for
> oxygen the solubility is expressed in cm^3/m^3*atm while for water vapor
> it is expressed in g/m^3.
> By definition the solubility is the limit, when pressure goes to zero, of
> the ratio of the gas concentration versus its partial pressure (Henry's
> law). Thus it should be expressed in
> volume_of_gas(STP)/volume_of_matrix*partial pressure.
> 
> Is there usually a difference that is accounted for in experiments that I
> am not aware of  and explains the different units for solubility?
> Also what is the conceptual difference between Henry's constant and
> solubility?
> 
> I am sorry if this question is trivial but it bothers me since a while and
> I would like to have an expert chemist answer on this (my background is
> not chemistry).
> 
> Thank you in advance,
> Ioana
> 
> ****************************************************************************
> * Ioana Cozmuta                 *                                          *
> * NASA-AMES Research Center     *  "Gravitation can not be held responsible*
> * Mail Stop 230-3               *  for people falling in love"             *
> * Moffet Field,CA 94035         *                                          *
> * phone: (650) 604-0993         *                           Albert Einstein*
> * fax:   (650) 604-0350         *                             (1879-1955)  *
> ****************************************************************************
> 
> -= This is automatically added to each message by mailing script =-
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-- 
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From chemistry-request@server.ccl.net Tue Dec 17 06:13:06 2002
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Date: Tue, 17 Dec 2002 11:15:46 +0100
From: "Nicolas Ferre'" <ferre@unisi.it>
Subject: G98: memory fault
Sender: ferre@unisi.it
To: chemistry@ccl.net
Cc: Annapaola <migani@unisi.it>
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Hi ccl,

I try to perform a CASSCF(12,11) frequency calculation using a very
large amount of memory (%MEM=37000MB) but when the CAS calculation
starts, while integrals are kept in core, it fails with:

   First order MCSCF. Prepare for Direct CPMCSCF
GetSCM:  Allocation for  REFSC failed:
Core=4597204656 Need=411151178 GauSpace=4597204656 MaxMem=554696704 
Avail=554696704.
  Error termination via Lnk1e in /cineca/prod/g98a11/g98/l510.exe.

What looks strange is that MaxMem is set to 554696704 words, that is
about 4.5 Gb, while the %MEM set it to a much larger value. What
happened ? Is there an upper limit to the memory usable with g98A11 ?
Thanks for any help.

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Nicolas FERRE' (PhD)
				 phone/fax : +39-0577-234278
Dipartimento di Chimica
Universita` di Siena             mailto:ferre@unisi.it
via Aldo Moro
53100 SIENA (Italia)             http://ccmaol1.chim.unisi.it/
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


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From chemistry-request@server.ccl.net Tue Dec 17 21:20:57 2002
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From: John Bushnell <bushnell@chem.ucsb.edu>
To: Rongjian Sa <rjsa@mail.shcnc.ac.cn>
cc: chemistry@ccl.net
Subject: Re: CCL:how to get  BSSE of systems with ECP basis sets
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Hi,

  Haven't done this, but I would do a first pass using the 'gfinput'
keyword to get the valence basis, then just include those as the
basis set for the metal (ghost) atoms (as a "general" basis set).
I can't imagine that BSSE would be effected by the core/ECP of the
metal anyway, as they shouldn't overlap with your ligands to any 
significant extent.

   - John

On Tue, 17 Dec 2002, Rongjian Sa wrote:

> Dear everyone:
> 
> I want to consider the BSSE of cation benzene systems. And I have put
> ECP basis sets for metal cations. Thus I can not use the massage
> keywords in Gaussian98 program. So I wander if you can tell me how to
> treat this problem? Are there any ways to get BSSE use Gaussian98
> program? I would appreciate your kind help!
> 
> Sincerely yours,
> Rongjian Sa


