Tang Si-Ping
Department of Chemistry and Material Science, Hengyang Normal University, Hengyang, Hunan 421008, People's Republic of China .
Acta Crystallogr Sect E Struct Rep Online. 2009 Apr 10;65(Pt 5):m504. doi: 10.1107/S1600536809012902.
In the title compound, [Co(C(6)H(5)N(2)O(4))(2)(H(2)O)(2)]·2C(3)H(7)NO, the Co(II) ion lies on an inversion center and adopts a slightly distorted CoN(2)O(4) octa-hedral geometry binding two bidentate chelating 5-carb-oxy-2-methyl-1H-imidazole-4-carboxyl-ate (H(2)MIDA(-)) monoanionic ligands and two axial aqua ligands. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link neighboring mol-ecules, generating a two-dimensional framework containing eight-membered H(4)O(4) rings. In addition, the dimethyl-formamide solvent mol-ecules are hydrogen bonded to the two-dimensional framework via the NH groups of the H(2)MIDA(-) ligands.
在标题化合物[Co(C₆H₅N₂O₄)₂(H₂O)₂]·2C₃H₇NO中，Co(II)离子位于一个对称中心上，采用略微扭曲的CoN₂O₄八面体几何构型，与两个双齿螯合的5-羧基-2-甲基-1H-咪唑-4-羧酸根（H₂MIDA⁻）单阴离子配体以及两个轴向水配体配位。在晶体结构中，分子间的O—H⋯O氢键连接相邻分子，形成了包含八元H₄O₄环的二维框架。此外，二甲基甲酰胺溶剂分子通过H₂MIDA⁻配体的NH基团与二维框架形成氢键。
