Acta Crystallographica Section E

Volume 67, Part 8 (August 2011)

organic compounds

 

Benzyl N-(1-{N'-[(E)-2,3-dihydroxybenzylidene]hydrazinecarbonyl}-2-hydroxyethyl)carbamate dihydrate

S. M. S. V. Wardell, E. R. T. Tiekink, M. V. N. de Souza, A. C. Pinheiro and J. L. Wardell

Abstract: The organic molecule in the title dihydrate, C₁₈H₁₉N₃O₆·2H₂O, adopts a twisted U-shape with the major twists evident about the chiral C atom [the C-N-C-C torsion angle is -88.2 (4) °] and about the oxygen-benzyl bond [C-O-C-C = 74.2 (4) °]. The conformation about the imine bond [1.290 (4) Å] is E and an intramolecular O-HN hydrogen bond helps to establish the near coplanarity of the hydroxybenzene and hydrazine groups. The crystal packing features O-HO and N-HO hydrogen bonds, leading to two-dimensional supramolecular arrays in the ab plane with weak C-H connections between the arrays.

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