From chemistry-request@www.ccl.net  Sun Aug 30 15:19:52 1998
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Date: Sun, 30 Aug 1998 15:19:52 -0400
From: shenkin@still3.chem.columbia.edu (Peter Shenkin)
Message-Id: <199808301919.PAA00478@still3.chem.columbia.edu>
To: chemistry@www.ccl.net
Subject: Re:  CCL:Quantitative normal mode analysis




Hi,


> From chemistry-request@www.ccl.net  Fri Aug 28 20:11:19 1998
> From: Yar Tikhiy <yar@radio-msu.net>
> A lot of good software for visualizing IR vibrations exists today.
> However, movies seem insufficient in case of complex systems
> like cluster models with "adsorbed" molecules on them. I'd like
> to find out if there are any methods or software allowing assignment
> (approximate, of course) of normal modes to this or that group of
> atoms when given normal vibration forms. Thank you.

MacroModel allows specified atoms in a system to be "frozen".
the remaining atoms can still be handled at the level of
second derivatives;  these "feel" the effect of the frozen
atoms as an external, immutable field.

We can make a movie of the normal modes of the system;  if this
is done on a system with frozen atoms, only the ones that are
unfrozen will actually move.  There are ways to color the
system so that all the frozen atoms are, say, white.

I doubt that we're unique in this regard;  I should think
that any program that allows atoms to be frozen and also
allows the visualization of normal modes whould be able
to accomplish this.

	-P.

**************** "Cultured people are the scum that floats ****************
*************** on the deep river of production" (Churchill) **************
*Peter Shenkin; Chemistry, Columbia U.; shenkin@columbia.edu (212)854-5143*
*MacroModel WWW page: http://www.columbia.edu/cu/chemistry/mmod/mmod.html *


From chemistry-request@www.ccl.net  Sun Aug 30 23:34:33 1998
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Date: Mon, 31 Aug 1998 00:47:23 -0300
From: Gustavo de Miranda Seabra <seabra@NPD.UFPE.BR>
Subject: overlap integrals on GAMESS
To: chemistry@www.ccl.net
Reply-to: Gustavo de Miranda Seabra <seabra@NPD.UFPE.BR>
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Dear all,

    Does anyone know how can I print the overlap integrals on GAMESS - =
US?

    Thanks very much.
-------------------------------------------------------------------------=
------------------
                      Gustavo de Miranda Seabra
MSc Student in Chemistry                  seabra@npd.ufpe.br
Federal University of Pernambuco                             Brazil
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<DIV><FONT face=3DArial size=3D2>Dear all,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>&nbsp;&nbsp;&nbsp; Does =
anyone know=20
how can I print the overlap integrals on GAMESS - US?</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>&nbsp;&nbsp;&nbsp; =
Thanks very=20
much.</FONT></DIV>
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size=3D2>----------------------------------------------------------------=
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;=20
Gustavo de Miranda Seabra<BR>MSc Student in=20
Chemistry&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
<A href=3D"mailto:seabra@npd.ufpe.br">seabra@npd.ufpe.br</A><BR>Federal =
University=20
of=20
Pernambuco&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
Brazil<BR>---------------------------------------------------------------=
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