From: <rg...@el...> - 2009-09-22 21:03:41
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On Tue, September 22, 2009 3:30 pm, Robert Hanson wrote: > multiple bonds -- I guess this depends upon your definition of "ideally." > Others feel that "ideally" the bonds should rotate so that there is never > a > question as to their order. In addition, this introduces the ambiguity in > cases such as H2SO4 where no reference plane exists. Definitely not easy. I think it'd make a good configuration option though. The CCDC's Mercury program uses the fixed-in-space orientation for the bond's components so if you need a model for setting it up I'd follow theirs just to be consistent. Rich |