Acta Cryst. (2008). E64, o1842  [ doi:10.1107/S1600536808027335 ]

3,5-Dimethyl-1-(2-pyridylcarbonyl)-5-[(2-pyridylcarbonyl)hydrazino]-2-pyrazoline methanol hemisolvate

Y. Chen, H. Yang, D. Li and D. Wang

Abstract: The title compound, C₁₇H₁₈N₆O₂·0.5CH₃OH, exists in the double keto form and adopts a highly puckered geometry, stabilized by intramolecular N-HO and N-HN hydrogen bonds. Intermolecular N-HN hydrogen bonds and - stacking interactions [centroid-centroid separation = 3.654 (1) Å] assemble the molecules into chains running in the [111] direction. The methanol solvent molecule is disordered over two sites related by inversion and forms a bifurcated O-H(N,O) hydrogen bond.

Online 30 August 2008

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