o-Chloro- and o-bromobenzonitrile: pseudosymmetry and pseudo-isostructural packing.
The structures of o-chlorobenzonitrile, C7H4ClN, (I), and o-bromobenzonitrile, C7H4BrN, (II), have similar packing arrangements, even though Z' = 4 in (I) and Z' = 1 in (II). Both structures involve X...N interactions, as well as weak C-H...X and C-H...N hydrogen bonds. The four crystallographically independent molecules in (I) are related by pseudosymmetry.
Britton
Doyle
D
Department of Chemistry, University of Minnesota, Minneapolis, MN 55455-0431, USA. britton@chem.umn.edu