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化学学报
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化学学报 ›› 2001, Vol. 59 ›› Issue (11): 1952-1956. 上一篇    下一篇

研究论文

YbCl3·3H2O-18-C-6-CH3COCH3体系(25℃)的相化学研究与 固态配合物的合成与 性质

李谦定;刘红科;任非;畅柱国;任德厚   

  1. 西安石油学院石油化学工程系;西北大学化学系.西安(710069);第一军医大学 药学部
  • 发布日期:2001-11-15

Study on phase chemistry of YbCl3·3H2O-18-C-6-CH3COCH3 system at 25℃ and synthesis and properties of solid complexes

Li Qianding;Liu Hongke;Ren Fei;Chang Zhuguo;Ren Dehou   

  1. Northwest Univ, Dept Chem.Xian(710069)
  • Published:2001-11-15

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采用半微量相平衡方法研究了YbCl3·3H2O-18-C-6-CH3COCH3三元体系(25℃)的溶度，测定了各饱和溶液的折光率，绘制了体系的溶度图与饱和溶液折光率曲线，考察了相平衡过程中水的行为。体系中形成两种化学计量的新配合物：2YbCl3·18-C-6·6H2O·CH3COCH3(1)与YbCl3·18-C-6·3H2O·0.5CH3COCH3(2)，两者均为固液异成分溶解的配合物。比较讨论了盐的阴离子与溶剂对形成配合物的影响。在相平衡结果指导下，制备了固态配合物，用化学分析、元素分析、IR,DTG,TG与DSC研究了固态配合物的组成与性质，预示了固态配合物YbCl3·18-C-6·3H2O与YbCl3·18-C-6的配位结构。

关键词: 氯化镱, 冠醚, 相平衡, 化学分析, 元素分析, 红外分光光度法, 热重量分析

The solubility of YbCl3·3H2O-18-C-6-CH3COCH3 systemat 25℃ was inestigated by a seminicro method of phase equilibrium study. The refractive indexes of the saturated solutions were determined. The solubility diagram and refractive index curve of saturated solutions were constructed. The behavior of water in this system during the equilibrium was examined. The results indicated that there were two new complexes formed in this system at 25℃, namely 2YbCl3·18-C-6· 6H2O·CH3COCH3(1) and YbCl3·18-C- 6·3H2O·0.5CH3COCH3(2). Both were of incongruenty in acetone. The influences of salt anions and solvents on formation of complexes were studied. Based on phase equilibrium data, the solid complexes were prepared. Their compositions and properties were investigated by IR spectroscopy, DTG- TG, DSC, as well as chemical and elemental analyse. The coordination structures were predicted for the solid complexes YbCl3·18-C-6·3H2O and YbCl3·18-C-6.

Key words: YTTERBIUM CHLORIDE, CROWN ETHER, PHASE EQUILIBRIUM, CHEMICAL ANALYSIS, ELEMENTAL ANALYSIS, INFRARED SPECTROPHOTOMETRY, THERMOGRAVIMETRY

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