Three-centre hydrogen bonds in triphenylphosphine oxide-hydroquinone (1/1)

Abstract

The title cocrystal, C18H15OP·C6H6O2, belongs to a series of mol-ecular systems based on triphenyl-phosphine P-oxide. The O atom of the oxide group acts as an acceptor for hydrogen bonds from OH groups of two hydro-quinone mol-ecules which lie on inversion centres [O⋯O = 2.7451 (17) and 2.681 (2) Å]. The crystal structure is stabilized by weak C - H⋯O hydrogen bonds, forming a C 2 1(8) chain which runs parallel to the [100] direction.