Synthesis and Supramolecular Structure of 6,6′-Diethoxy-2,2′-[1,1′-(hexane-1,6-diyldioxy)bis(nitrilomethylidyne)]diphenol

The compound, 6,6'-diethoxy-2,2'-[1,1'-(hexane-1,6-diyldioxy)bis(nitrilomethylidyne)]diphenol, was synthesized by the reaction of 3-ethoxysalicylaldehyde with 1,6-bis(aminoosy)hexane in ethanol. The molecule lies across a crystallographic inversion centre (symmetry code: -x, -y, -z) and adopts an E configuration with respect to the azomethine C=N bond. Within the molecule, the two benzene rings are parallel to each other and with the distance of 3.976(4) angstrom. Intramolecular O-H center dot center dot center dot N hydrogen bonds are formed between the hydroxyl groups and the oxime nitrogen atoms. The distances between the hydroxyl groups and the oxime nitrogen atoms d(O2 center dot center dot center dot N1) = 2.626(3)angstrom. Intermolecular C-H center dot center dot center dot O hydrogen bonds link the title molecules into an infinite 3D supramolecular network structure.