title: 4-(Diphenyl-phosphino-yl)benzoic acid.
abstract: Mol-ecules of the title compound, C(19)H(15)O(3)P, are connected by O-H⋯O hydrogen bonds between the carboxylic acid OH group and the phosphinoyl O atom, forming chains running along the crystallographic b axis.
authors.affiliation: Faculty of Chemistry and Biology, Beihua University, Jilin City 132013, People's Republic of China.
authors.forename: Yuan-Jing
authors.initials: YJ
authors.lastname: Li
authors.forename: Rong-Chang
authors.initials: RC
authors.lastname: Zhang