title: (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).
authors: Fachrichtung Chemie, Universität des Saarlandes, Postfach 151150, D-66041 Saarbrücken,  Germany.
authors: Sabine
authors: S
authors: Wilbrand
authors: Christian
authors: C
authors: Neis
authors: Kaspar
authors: K
authors: Hegetschweiler