Acta Cryst. (2008). E64, o545  [ doi:10.1107/S1600536808003206 ]

3,8-Bis(4-chlorophenyl)-4,7-dimethyltricyclo[4.2.2.0^2,5]deca-3,7-diene

M. Tomura and Y. Yamashita

Abstract: The title tricyclic diene, C₂₄H₂₂Cl₂, is the product of thermal ring-opening of a corresponding basketane (pentacyclo[4.4.0.0^2,5.0^3,8.0^4,7]decane) derivative. The cyclobutene ring is planar to within 0.0032 (12) Å and its geometry is normal. The two 4-chlorophenyl groups are oriented in an approximately face-to-face conformation with a dihedral angle of 44.14 (6)° between them. The 4-chlorophenyl group bonded to the cyclobutene ring lies almost in the plane of the cyclobutene ring, with a dihedral angle of 8.29 (17)° between the ring planes. The average intramolecular CC distance between the two C=C bonds is 2.92 Å. In the crystal structure, the molecules are well separated with no close C-HCl or C-H intermolecular interactions.

Online 6 February 2008

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