The Forgotten Polymorphism of Hydrazine Sulfate: Crystal Structure of the Metastable Monoclinic Form II
作者:Thomas Martin、Juliane Fleissner、Wolfgang Milius、Josef Breu
DOI:10.1002/zaac.201700336
日期:2017.12.13
(hydrazine) sulfate(IV) was isolated as macroscopic single crystals and its structure was determined and refined as twin from single-crystal X-ray data collected at 173 K [cell parameters: a = 5.5592(11) A, b = 7.3571(15) A, c = 10.270(2) A, β = 96.75(3)°, V = 416.21(15) A3, space group P21/c]. The structure shows some similarities to the structure of the known form I: Both form II and I share zigzag shaped
迄今为止结构未知的硫酸二氢肼 (肼) (IV) 的多晶型物(II 型)被分离为宏观单晶,其结构从 173 K 下收集的单晶 X 射线数据中确定和精炼为孪晶 [细胞参数: a = 5.5592(11) A, b = 7.3571(15) A, c = 10.270(2) A, β = 96.75(3)°, V = 416.21(15) A3, 空间群 P21/c]。该结构显示出与已知 I 型结构的一些相似之处:II 型和 I 型都共享沿 a 轴运行的锯齿形 [SO4]2- 离子链。在这两种形式中,链由反式(交错)[N2H6]2+ 离子分隔。然而,两种形式的空间取向不同。因此,形成了不同的氢键网络。