3-(p-Cyanophenoxy)quadricyclane and a Redetermination of the Structure of a Hexachloroquadricyclane Dicarboxylate

摘要

The first single crystal X ray structure of a substituted quadricyclane was reported recently. Surprisingly, two C-C bond lengths in which symmetry considerations suggest should be identical are reported to be nonequivalent. It was suggested that repulsive nonbonded interactions between the carbonyl oxygen atom in the C(1) ester group and the adjacent carbon-chlorine bond, C(7)-C1, might be responsible for this result. The structure has been redetermined and, in fact, the chemically equivalent bonds are statistically equivalent.