title: Triphenyl-phosphine oxide-2-(4-hydroxy-benzen-yl)-4,4,5,5-tetra-methyl-imidazolidine-1-oxyl 3-oxide (1/1).
abstract: The title compound, C(18)H(15)OP·C(13)H(17)N(2)O(3), belongs to a series of mol-ecular systems based on triphenyl-phosphine oxide. The O atom of the oxide group acts as an acceptor for hydrogen bonds from -OH groups of the nitronyl nitroxide. The crystal structure is stabilized by O-H⋯O hydrogen bonds.
authors.affiliation: Department of Chemistry, School of Pharmacy, Fourth Military Medical University, Changle West Road 17, 710032 Xi-An, People's Republic of China.
authors.forename: Lin-Lin
authors.initials: LL
authors.lastname: Jing
authors.forename: Hai-Bo
authors.initials: HB
authors.lastname: Wang
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Sun