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Acta Cryst. (2008). E64, o1600-o1601  [ doi:10.1107/S1600536808023064 ]

6,6'-Dihydroxy-2,2'-[(pentane-1,5-diyldioxy)bis(nitrilomethylidyne)]diphenol

W.-K. Dong, X.-N. He, Y.-H. Guan, L. Xu and Z.-L. Ren

Abstract: The molecule of the title compound, C19H22N2O6, assumes a W-shaped configuration with the dihedral angle between the two halves of the molecule being 82.48 (5)°. There is one half-molecule in the asymmetric unit with a crystallographic twofold rotation axis passing through the central C atom of the five methylene groups in the [-CH=N-O-(CH2)5-O-N=CH-] bridge. The dihedral angle formed by the two benzene rings in each molecule of the title compound is 84.18 (4)°. There are strong intramolecular O-H...N and O-H...O hydrogen bonds and weak intermolecular [pi]-[pi] stacking interactions between neighbouring benzene rings, and the intermolecular plane-to-plane distances are 3.488 (2) and 3.841 (3) Å along the b and c axes, respectively. In the crystal structure, intermolecular O-H...O hydrogen bonds link each molecule to two others, forming an infinite three-dimensional supramolecular structure.

Online 26 July 2008


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