[CPMD-list] Problems with molecule in Oh point group
Axel Kohlmeyer
akohlmey at cmm.chem.upenn.edu
Tue Aug 14 18:26:57 CEST 2007
On Tue, 14 Aug 2007, Phil McCaffrey wrote:
hi phil,
please try with symmetry 1 and turn off ISOLATED MOLECULE.
other than that, i suspect that your
input parameters with respect to convergence
of geometry and wavefunction are overdoing it.
the noise from the spline grids and due to
your gc-cutoff and generally the errors from
DFT should be larger than what you are trying
to converge to.
cheers,
axel.
PM> Hi,
PM>
PM>
PM> I am having problems getting CPMD to recognise the Oh point group of my molecule.
PM> I have tried to orient the molecule in a way that fits with the rules previously posted (given below).
PM> However, i consistently get errors involving symmetry operations.
PM>
PM> I have attached the input and output files if someone could take a look it would be much appreciated
PM>
PM> - Positioning of the molecule:
PM> z-axis is the principal axis
PM> x-axis is the two-fold axis
PM> xz-plane is the sigma-v plane
PM> xy-plane is the sigma-h or the Cs symmetry plane
PM> origin is the center of inversion
PM>
PM> Thanks for your time.
PM>
PM> -Phil
PM>
PM>
--
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Axel Kohlmeyer akohlmey at cmm.chem.upenn.edu http://www.cmm.upenn.edu
Center for Molecular Modeling -- University of Pennsylvania
Department of Chemistry, 231 S.34th Street, Philadelphia, PA 19104-6323
tel: 1-215-898-1582, fax: 1-215-573-6233, office-tel: 1-215-898-5425
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