Plutenko Maksym O, Haukka Matti, Husak Alina O, Iskenderov Turganbay S, Mulloev Nurullo U
Department of Chemistry, National Taras Shevchenko University, Volodymyrska Street 64, 01601 Kyiv, Ukraine.
Department of Chemistry, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyvaskyla, Finland.
Acta Crystallogr E Crystallogr Commun. 2021 Feb 26;77(Pt 3):298-304. doi: 10.1107/S205698902100205X. eCollection 2021 Mar 1.
The title compound, {[KNi(CHNO)]·4.8HO} , was obtained as a result of a template reaction between oxalohydrazide-hydroxamic acid, formaldehyde and nickel(II) nitrate followed by partial hydrolysis of the formed inter-mediate. The two independent [Ni(CHNO)] complex anions exhibit pseudo- symmetry and consist of an almost planar metal-containing fragment and a 1,3,5-oxadiazinane ring with a chair conformation disposed nearly perpendicularly with respect to the former. The central Ni atom has a square-planar NO coordination arrangement formed by two amide N and two carboxyl-ate O atoms. In the crystal, the nickel(II) complex anions form layers parallel to the plane. Neighboring complex anion layers are connected by layers of potassium cations for which two of the four independent cations are disordered over two sites [ratios of 0.54 (3):0.46 (3) and 0.9643 (15):0.0357 (15)]. The framework is stabilized by an extensive system of hydrogen bonds where the water mol-ecules act as donors and the carb-oxy-lic O atoms, the amide O atoms and the oxadiazinane N atoms act as acceptors.
标题化合物{[KNi(CHNO)]·4.8HO} 是由草酰肼-异羟肟酸、甲醛与硝酸镍(II)之间的模板反应，随后对形成的中间体进行部分水解而得到的。两个独立的[Ni(CHNO)]络合阴离子呈现出伪 对称性，由一个几乎平面的含金属片段和一个椅式构象的1,3,5-恶二嗪烷环组成，该环相对于前者几乎垂直排列。中心Ni原子具有由两个酰胺N原子和两个羧酸根O原子形成的平面正方形NO配位构型。在晶体中，镍(II)络合阴离子形成平行于 平面的层。相邻的络合阴离子层通过钾阳离子层连接，四个独立阳离子中的两个在两个位置上无序分布[比例为0.54 (3):0.46 (3)和0.9643 (15):0.0357 (15)]。该骨架通过广泛的氢键体系得以稳定，其中水分子作为供体，羧酸O原子、酰胺O原子和恶二嗪烷N原子作为受体。
