This is a general question I was meant to ask for a while: is there a way to 
set/ask for 
different ring conformations for saturated 6-membered rings when generating 3D 
coordinates 
(from SMILES, for example)?

I know OpenBabel uses a pattern from a ring conformation library, but I didn't 
find 
anything pointing to it. Ideally, it would be great to be able to generate both 
chair 
conformations for a substitute cyclo-hexane, for example.

If this is not possible to set during the actual generation phase, is there a 
way to alter 
only the ring conformation without having to run a full conformational search?

Thanks,

S


-- 
  Stefano Forli, PhD

  Staff Scientist
  Molecular Graphics Laboratory
  Dept. of Integrative Structural
   and Computational Biology, MB-112F
  The Scripps Research Institute
  10550  North Torrey Pines Road
  La Jolla,  CA 92037-1000,  USA.

     tel: +1 (858)784-2055
     fax: +1 (858)784-2860
     email: fo...@scripps.edu
     http://www.scripps.edu/~forli/

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