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

Abstract

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.