Synthesis and Crystal Structure of 4,4′,6,6′-Tetrachloro-2,2′-[(1,4-butylene)dioxybis(nitrilmethylidyne)]diphenol

The compound 4,4',6,6'-tetrachloro-2,2'-[(1,4-bytylene)dioxybis(nitrilmethylidyne)]diphenol with the molecular formula C18H16Cl4N2O4, was synthesized by the reaction of 3,5-dichloro-2-hydroxybenzaldehyde with 1,4-bis(aminooxy)butane in ethanol. The molecule is disposed about a crystallographic centre of symmetry and the molecule adopts an extended conformation where the two phenoldoxime moieties are aparat from each other. There are strong O-H center dot center dot center dot N intramolecular hydrogen bond and weak C-H center dot center dot center dot O and C-H center dot center dot center dot Cl intermolecular hydrogen bonds and strong intermolecular stacking interactions (the nearest benzene rings are parallel to that of another molecule are ca 2.512(2) angstrom, stabilizing the two dimensional structures of the present compound.