Pseudomerohedrally twinned crystal structure of 2,3‐diphenyl­buta‐1,3‐diene

The title compound, C₁₆H₁₄, is twinned by reticular pseudomerohedry of twin index 2. The primitive monoclinic cell of the single crystal can be transformed into a B‐centred pseudo‐orthorhombic supercell with a fourfold volume. The twofold twin operation about the reciprocal a* axis of the primitive monoclinic cell is co‐directional with the approximate C₂ axis of the mol­ecule and a symmetry element of the orthorhombic supercell. A tentative twin domain model is proposed.