Benzvalene
= Benzvalene
A cage isomer of <benzene> with one <carbon>–<carbon> <double bond>, conventionally described as tricyclo\[3.1.0.0(2,6)\]hex-3-ene. Its ideal cage geometry belongs to the <C2v molecular point group>. <Molecular symmetry> depends on the full three-dimensional cage rather than the apparent <symmetry> of a planar skeletal projection.