(4-Ethenylphen­yl)diphenyl­phosphine selenide

In the title mol­ecule, C₁₀H₁₇PSe, the P atom has a distorted tetra­hedral environment resulting in an effective cone angle of 165°. The benzene ring makes dihedral angles of 70.04 (8) and 77.28 (8)° with the phenyl rings, while the dihedral angle between the phenyl rings is 62.95 (8)°. In the crystal, mol­ecules are linked by C—H...π inter­actions.