(S)-2,2'-Dihy-droxy-N,N'-(6-hy-droxy-hexane-1,5-di-yl)dibenzamide

Abstract

In the title compound, C(20)H(24)N(2)O(5), the dihedral angle between the two roughly planar salicyl-amide fragments [r.m.s. deviations = 0.043 (2) and 0.149 (2) Å] is 25.50 (5)°. The mol-ecular conformation is stabilized by intra-molecular O-H⋯O hydrogen bonds involving phenol -OH groups and amide O atoms. Inter-molecular hy-droxy-meth-yl-amide O-H⋯O and amine-hy-droxy-methyl N-H⋯O hydrogen bonds form infinite chains along the b axis. These chains are further inter-linked by amine-amide N-H⋯O and phenol-phenol O-H⋯O inter-actions, thus giving layers parallel to (001).

Fig. 1.

Ellipsoid plot (50% probability level) and numbering scheme of the title compound.

Fig. 2.

Section of a strand generated by a 21 screw (with intra- and intermolecular hydrogen bonds shown as green and black dashed lines, respectively); interlinking of such strands by additional N—H···O(amide) and O(phenolic)—H···O(phenolic) hydrogen bonding is indicated by yellow dashed lines. C atoms (black) are shown as a stick model; O (red), N (blue), H(—O) and H(—N) atoms are shown as spheres of arbitrary size. H(—C) atoms are omitted for clarity.