title: 3,5-Dimethyl-1-(2-pyridylcarbon-yl)-5-[(2-pyridylcarbon-yl)hydrazino]-2-pyrazoline methanol hemisolvate.
abstract: The title compound, C(17)H(18)N(6)O(2)·0.5CH(3)OH, exists in the double keto form and adopts a highly puckered geometry, stabilized by intra-molecular N-H⋯O and N-H⋯N hydrogen bonds. Inter-molecular N-H⋯N hydrogen bonds and π-π stacking inter-actions [centroid-centroid separation = 3.654 (1) Å] assemble the mol-ecules into chains running in the [111] direction. The methanol solvent mol-ecule is disordered over two sites related by inversion and forms a bifurcated O-H⋯(N,O) hydrogen bond.
authors.forename: Yuting
authors.initials: Y
authors.lastname: Chen
authors.forename: Hua
authors.initials: H
authors.lastname: Yang
authors.forename: Dacheng
authors.initials: D
authors.lastname: Li
authors.forename: Daqi
authors.initials: D
authors.lastname: Wang