From:	"Joachim Paier" <joachimpaier$at$hotmail.com>
Date:	Tue, 07 Sep 2004 21:17:04 +0200
Subject:	Re: CCL:vibrational spectra of first exc. state w. G03

>From: help$at$gaussian.com
>To: Joachim Paier 
>Subject: Re: CCL:vibrational spectra of first exc. state w. G03
>Date: Tue, 7 Sep 2004 10:06:02 -0400
>
>
>
>   Dr. Paier,
>
>   The only viable approach for this is CI singles.  You would use
>
># CIS=(Direct,Root=2) Opt Freq
>
>to get the second excited state optimized geometry and frequencies.
>Check under CIS in the User's Reference for other possible options.
>
>On Sun, Sep 05, 2004 at 04:08:32PM +0200, Joachim Paier wrote:
> > Hi  # - at - #  all,
> >
> > I'm interested in calculating the vibrational spectra of
> > the first excited state of an
> > organic compound (C23H23N2O2+) ...
> >
> > 1) is it principally possible to 'tackle' this problem with G03 (system
> > size!!)
> > 2) if yes - which method could I apply?
> >
> > I would be really grateful for a detailed description of
> > the method (keywords etc ...)
> >
> > regards,
> > Joachim
> >
> > -----------------------------------------------------------------
> > Joachim Paier
> > Institut f|r Materialphysik,  Univ. Wien
> > Sensengasse 8/12, A-1090 Wien, Austria
> > mail: joachimpaier$at$hotmail.com
> > -----------------------------------------------------------------
> >
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>
>--
>Douglas J. Fox
>Technical Support
>Gaussian, Inc.
>help$at$gaussian.com

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