IUBio

Help with SHELXL-97 connectivity formation

Boyd Reid Steere steere at mbi.ucla.edu
Sun Jun 28 20:31:30 EST 1998


Hello, all:

I'm having trouble breaking some bonds in SHELXL-97.  I'm refining a
molecule with 2 monomers/asymmetric unit in P2(1)2(1)2. There are
multiple crystal contacts between equivalent molecules, and I am having
trouble getting SHELXL to stop forming bonds between nearby atoms across
these contacts and refining them towards each other. 

I know that I can use CONN 0 and an atom list to restrict bond
formation, but I just can't get the syntax right to form an atom list
that includes all symmetry-equivalent atoms.  Has anyone perfomed a
SHELXL-97 run in which you used an atom list to exclude all equivalent
atoms from the refinement?  I'd love to see how you did it.  Thanks!

Boyd Steere




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