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cycloheptadiene (plural cycloheptadienes)

  1. (organic chemistry) Any of several isomeric unsaturated alicyclic hydrocarbons having seven carbon atoms and two double bonds; any derivative of such compound
    Aldrichimica Acta Volume 30 No 4 (pdf) from Sigma-Aldrich
    Decomposition of 4 in the presence of cis-piperylene at room temperature results in the stereocontrolled formation of trans-cycloheptadiene 27 in 90% ee (96% ee at -78 °C).