title: Crystal structure of diethyl [(4-nitro-phenyl-amino)(2-hy-droxy-phen-yl)meth-yl]phospho-nate methanol monosolvate.
abstract: In the title compound, C17H21N2O6P·CH3OH, the planes of the 4-nitro-aniline and 2-hy-droxy-phenyl groups form a dihedral angle of 84.04 (8)°. The P atom exhibits tetra-hedral geometry involving two O-ethyl groups, a Cα atom and a double-bonded O atom. In the crystal, O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds link the α-amino-phospho-nic acid and methanol mol-ecules into chains that propagate parallel to the a axis.
authors.affiliation: School of Pharmacy, Yancheng Teachers' University, Yancheng, Jiangsu 224051, People's Republic of China.
authors.forename: QingMing
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
authors.forename: Feng
authors.initials: F
authors.lastname: Su
authors.affiliation: School of Pharmacy, Yancheng Teachers' University, Yancheng, Jiangsu 224051, People's Republic of China.
authors.forename: TingTing
authors.initials: T
authors.lastname: Yang
authors.affiliation: Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
authors.forename: LiPing
authors.initials: L
authors.lastname: Lu
authors.affiliation: Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
authors.forename: MiaoLi
authors.initials: M
authors.lastname: Zhu
keywords: crystal structure; hydrogen bonding; phospho­nate salts; α-amino­phospho­nic acids