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

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.

标题化合物为C₂₀H₁₆Br₄，其两个乙烯基取代基均以4,12-二甲酰基[2.2]对环芳烷为起始原料，通过科里-富克斯反应（Corey-Fuchs reaction）引入。该标题化合物可作为二乙炔基[2.2]对环芳烷合成的重要前驱体。标题分子具有中心对称性，在两个苯环的中心之间存在一个晶体学对称中心。观测到显著的平面倾斜：最佳芳香环平面与乙烯基平面之间的平面间夹角为49.4(5)°。晶体中未发现显著的分子间相互作用。