meso-2,2,2',2'-Tetrachloro-1,1'-diphenyl-1,1'-bicyclopropyl and meso-2,2,2',2'-Tetrabromo-1,1'-diphenyl-1,1'-bicyclopropyl

Molecules of meso-2,2,2',2'-tetrachloro-1,1'-diphenyl-1,1'-bicyclopropyl, C₁₈H₁₄Cl₄, (1), and meso-2,2,2',2'-tetrabromo-1,1'-diphenyl-1,1'-bicyclopropyl, C₁₈H₁₄Br₄, (2), adopt gauche conformations. Compound (1) produced two types of crystals upon recrystallization. The phenyl rings of the two forms of compound (1), as well as those of compound (2), are in a nearly perpendicular orientation. All three structures have unsymmetrical cyclopropane rings, with the shortest C-C bond being between the rings at the point of phenyl substitution.

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