The structure of the title compound, 2C18H19ClN4O·HCl or (CNO)2·HCl (C36H39Cl3N8O2), at 100 K has tetragonal (I4/m) symmetry. The dihedral angle between the benzene rings of the fused ring system of the CNO molecule is 40.08 (6)° and the equivalent angle between the seven-membered ring and its pendant N-oxide ring is 31.14 (7)°. The structure contains a very strong, symmetrical O—H...O hydrogen bond [O...O = 2.434 (2) Å] between two equivalent R 3N+—O− moieties, which share a proton lying on a crystallographic twofold rotation axis. These units then form a (CNO)4·(HCl)2 ring by way of two equivalent N—H...Cl hydrogen bonds (Cl− site symmetry m). These rings are catenated into infinite chains propagating along the c-axis direction by way of shape complementarity and directional C—H...N and C—H...π interactions.

中文翻译：

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氯氮平N-氧化物半盐酸盐的合成与结构：无限氢键聚[n]链烯

标题化合物的结构，2C18H19 号氯氮4O·HCl或(CNO)2·HCl（C36H39氯3氮8氧2)，在 100 K 时有四方晶系 (我4/米）对称性。CNO分子稠环系苯环之间的二面角为40.08(6)°，七元环与其侧链之间的当量角氮-氧化环为31.14(7)°。该结构在两个等价分子之间包含非常强、对称的 O—H...O 氢键 [O...O = 2.434 (2) Å]右 3氮+—O-部分，它们共享位于晶体双重旋转轴上的质子。然后这些单位组成一个（CNO）4·(盐酸)2环通过两个等价的NH…Cl氢键(Cl-位点对称性米）。这些环被连接成无限的链，沿着环传播C-轴方向通过形状互补和方向性 C—H...N 和 C—H...π 相互作用。