Structure Reports Online

Volume 65, Part 3 (March 2009)

organic compounds

Acta Cryst. (2009). E65, o528 [ doi:10.1107/S1600536809002475 ]

4,12-Bis(2,2-dibromovinyl)[2.2]paracyclophane

S. Clément, L. Guyard, M. Knorr, C. Däschlein and C. Strohmann

Abstract: In the title compound, C₂₀H₁₆Br₄, both vinylic substituents were introduced by a Corey-Fuchs reaction using 4,12-diformyl[2.2]paracyclophane as starting material. The title compound may be used as a valuable precursor for the synthesis of diethynyl[2.2]paracyclophane. The title molecule is centrosymmetric with a crystallographic center of inversion between the centers of the two phenyl rings. A strong tilting is observed with an interplanar angle between the best aromatic plane and the vinyl plane of 49.4 (5)°. No significant intermolecular interactions are found in the crystal.