Acta Cryst. (2009). E65, o2129  [ doi:10.1107/S1600536809030852 ]

(E)-2,4-Dihydroxybenzaldehyde 4-ethylthiosemicarbazone-4,4'-bipyridine-water (4/7/2)

S. W. Ng

Abstract: The asymmetric unit of the title compound, 7C₁₀H₈N₂·4C₁₀H₁₃N₃O₂S·2H₂O, contains two independent 2,4-hydroxybenzaldehyde 4-ethylthiosemicarbazone molecules, three and a half 4,4'-bipyridine molecules and one water molecule. Two of the 4,4'-bipyridine molecules lie on general positions and the other three on centers of inversion. The two 4,4'-bipyridine molecules on general positions and one of the three on special positions are disordered over two positions each with an occupancy of 0.50. The -NH-C(=S)-NH-NC fragment is close to planar in the two 2,4-hydroxybenzaldehyde 4-ethylthiosemicarbazone molecules (r.m.s. deviations = 0.04 and 0.05 Å). In the crystal, the Schiff base, N-heterocycle and water molecules engage in O-HO, O-HN and N-HO hydrogen-bonding interactions, generating a layer structure.

Online 12 August 2009

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