title: 2-[(E)-(3-Carb-oxy-4-hy-droxy-phen-yl)iminiometh-yl]-4-chloro-phenolate.
abstract: The title Schiff base compound, C(14)H(10)ClNO(4), has been synthesized by the reaction of 5-amino-2-hy-droxy-benzoic acid and 5-chloro-2-hy-droxy-benzaldehyde. The mol-ecule is a zwitterion in the crystal, with the phenolic hy-droxy group deprotonated and the imine N atom protonated. It adopts an E configuration about the central C=N double bond. The dihedral angle between the two benzene rings is 3.83 (7)°. Intra-molecular N-H⋯O and O-H⋯O hydrogen bonding generates S(6) ring motifs. In the crystal, mol-ecules are connected by inter-molecular O-H⋯O and C-H⋯Cl hydrogen bonds, forming a supra-molecular chain.
authors: Abeer Mohamed
authors: AM
authors: Farag
authors: Teoh Siang
authors: TS
authors: Guan
authors: Hasnah
authors: H
authors: Osman
authors: Madhukar
authors: M
authors: Hemamalini
authors: Hoong-Kun
authors: HK
authors: Fun
references: Bioorg Med Chem. 2006 Nov 15;14(22):7482-9
references: 16879972
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references: 19171970