Ishikawa Yoshinobu, Watanabe Kohzoh
School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan.
Acta Crystallogr Sect E Struct Rep Online. 2014 Jul 2;70(Pt 8):o832. doi: 10.1107/S1600536814014937. eCollection 2014 Aug 1.
In the title chromone-tethered benzohydrazide derivative, C21H20N2O7·H2O, the atoms of the 4H-chromen-4-one segment are essentially coplanar (r.m.s. deviation = 0.0073 Å) with the largest deviation from the mean plane [0.012 (3) Å] being found for the benzene C atom. The dihedral angles between the chromone segment and the hydrazide plane and between the chromone segment and the benzene ring of the tri-meth-oxy-benzene unit are 24.67 (9) and 41.28 (8) Å, respectively. The mol-ecule is connected to the solvent water mol-ecule by O-H⋯O hydrogen bonds and weak C-H⋯O inter-actions. Additional N-H⋯O inter-actions are observed and together they link the mol-ecules into chains forming a two-dimensional network along (011).
在标题化合物色酮连接的苯甲酰肼衍生物C₂₁H₂₀N₂O₇·H₂O中，4H-色烯-4-酮片段的原子与苯环C原子偏离平均平面的最大偏差[0.012(3)Å]基本共面（均方根偏差 = 0.0073 Å）。色酮片段与酰肼平面之间以及色酮片段与三甲氧基苯单元的苯环之间的二面角分别为24.67(9)和41.28(8)Å。分子通过O-H⋯O氢键和弱C-H⋯O相互作用与溶剂水分子相连。还观察到额外的N-H⋯O相互作用，它们共同将分子连接成链，沿(011)形成二维网络。
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