Acta Cryst. (2009). E65, o75  [ doi:10.1107/S1600536808038087 ]

N²,N^2'-Bis(2-hydroxybenzylidene)-2,2'-bipyridyl-3,3'-dicarbohydrazide

S.-B. Miao, L.-L. Zang, Y.-W. Fan and B.-M. Ji

Abstract: In the title compound, C₂₆H₂₀N₆O₄, the two aroylhydrazone side groups exist as diastereomeres, both in the keto form in the crystal structure. The aroylhydrazone units support the molecular conformation through an intramolecular N-HO hydrogen bond. Two molecules are connected into a centrosymmetric dimer by intermolecular N-HN hydrogen bonds. These dimers are connected into chains along the a axis by intermolecular O-HO hydrogen bonds. The combination of these hydrogen bonds results in layers in the bc plane. The layers are further linked by weak C-H contacts to form a three-dimensional network structure.

Online 10 December 2008

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