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配合物 MgCl_2·6H_2O·2CH_3CON(CH_3) _2(CH_3CON(CH_3) _2简称 DMA)经化学分析和 x-射线结构分析,确定其化学式为[Mg(H_2O)_4(DMA)_2] Cl_2·2H_2O,晶体属单斜晶系,空间群 C_2,晶胞参数:a=1. 6391nm,b=0. 8012nm,c=0. 7374nm,β=91. 28,z=2. 晶体结构是用 Patterson 法和 Fourier 合成法解析的,经全矩阵最小二乘法修正。最后 R 因子降至0. 090. 结果表明,配合物晶体中 Mg~(2+)与四个 H_2O 分子和两个 DMA 分子以八面体方式相连,形成配阳离子[Mg(H_2O)_4(DMA)_2] ~(2+),两个 Cl~-离子和其余的两个 H_2O 分子分别充填于这些配离子之间.本文还对该配合物进行了 IR、TG-DTG 等研究.
The chemical formula of MgCl_2 · 6H_2O · 2CH_3CON (CH_3) _2 (CH_3CON (CH_3) _2 DMA) was determined by chemical analysis and X-ray structure analysis, and its chemical formula was determined as [Mg (H_2O) _4 (DMA) _2] Cl_2 · 2H_2O. Is a monoclinic, the space group C_2, unit cell parameters: a = 1. 6391nm, b = 0. 8012nm, c = 0. 7374nm, β = 91.28, z = 2. The crystal structure is calculated using the Patterson method and Fourier Synthetic analysis, the whole matrix least squares correction. The final R factor decreased to 0.090. The results show that the complex crystal Mg ~ (2 +) and four H_2O molecules and two DMA molecules octahedron way to form a cation [Mg (H_2O) _4 (DMA) _2] ~ (2+), two Cl ~ - ions and the rest two H_2O molecules were filled in these ions.In this article, the IR, TG-DTG and other studies were also carried out.