Bouaoud Yasmina, Setifi Zouaoui, Buvailo Andrii, Potaskalov Vadim A, Merazig Hocine, Dénés Georges
Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale (CHEMS), Université Constantine 1, Constantine 25000, Algeria.
Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale (CHEMS), Université Constantine 1, Constantine 25000, Algeria; Laboratoire de Chimie, Ingénierie Moléculaire et Nanostructures (LCIMN), Université Ferhat Abbas Sétif 1, Sétif 19000, Algeria.
Acta Crystallogr E Crystallogr Commun. 2016 Jan 1;72(Pt 1):21-4. doi: 10.1107/S2056989015023269.
The asymmetric unit of the title polymer, [Co2(C3H3O4)2Cl2(H2O)2] n , comprises one Co(II) atom, one water mol-ecule, one singly deprotonated malonic acid mol-ecule (HMal(-); systematic name 2-carb-oxy-acetate) and one Cl(-) anion. The Co(II) atom is octa-hedrally coordinated by the O atom of a water mol-ecule, by one terminally bound carboxyl-ate O atom of an HMal(-) anion and by two O atoms of a chelating HMal(-) anion, as well as by two Cl(-) anions. The Cl(-) anions bridge two Co(II) atoms, forming a centrosymmetric Co2Cl2 core. Each malonate ligand is involved in the formation of six-membered chelate rings involving one Co(II) atom of the dinuclear unit and at the same time is coordinating to another Co(II) atom of a neighbouring dinuclear unit in a bridging mode. The combination of chelating and bridging coordination modes leads to the formation of a two-dimensional coordination polymer extending parallel to (001). Within a layer, O-Hwater⋯Cl and O-Hwater⋯O hydrogen bonds are present. Adjacent layers are linked through O-H⋯O=C hydrogen bonds involving the carb-oxy-lic acid OH and carbonyl groups.
标题聚合物[Co2(C3H3O4)2Cl2(H2O)2]n的不对称单元包含一个Co(II)原子、一个水分子、一个单去质子化的丙二酸分子（HMal(-)；系统名称为2-羧基乙酸根）和一个Cl(-)阴离子。Co(II)原子由一个水分子的O原子、一个HMal(-)阴离子末端结合的羧酸根O原子、一个螯合HMal(-)阴离子的两个O原子以及两个Cl(-)阴离子八面体配位。Cl(-)阴离子桥连两个Co(II)原子，形成一个中心对称的Co2Cl2核。每个丙二酸配体参与形成涉及双核单元中一个Co(II)原子的六元螯合环，同时以桥连模式与相邻双核单元的另一个Co(II)原子配位。螯合和桥连配位模式的结合导致形成平行于(001)延伸的二维配位聚合物。在一层内，存在O-Hwater⋯Cl和O-Hwater⋯O氢键。相邻层通过涉及羧酸OH和羰基的O-H⋯O=C氢键相连。
