Research Article: (E)-3-[(2-Hy­droxy-3-meth­oxy­benzyl­idene)amino]­benzoic acid

Date Published: April 01, 2012

Publisher: International Union of Crystallography

Author(s): Hadi Kargar, Zahra Sharafi, Reza Kia, Safoora Ghelenji, Muhammad Nawaz Tahir.


In the title compound, C15H13NO4, the dihedral angle between the substituted benzene rings is 9.9 (8)°. Part of the mol­ecule (the salicylaldimine segment) is disordered over two sets of sites, with a refined site-occupancy ratio of 0.550 (14):0.450 (14). Intra­molecular O—H⋯N hydrogen bonds form S(6) ring motifs. In the crystal, pairs of O—H⋯O hydrogen bonds link mol­ecules into centrosymmetric dimers with R22(8) ring motifs. The crystal packing also features C—H⋯π inter­actions.

Partial Text

For standard bond lengths, see: Allen et al. (1987 ▶). For hydrogen-bond motifs, see: Bernstein et al. (1995 ▶). For background to Schiff base ligands and their complexes, see, for example, Kargar et al. (2011 ▶, 2012 ▶); Kia et al. (2010 ▶).