【摘要】 本文应用半微量法研究了La（NO₃）₃·4H₂O-B15C5-CH-3CN三元体系在25±0.1℃时的溶解度,并测定了该体系各饱和溶液的折光率.结果表明该体系只有一种组成的络合物La（NO₃）₃·B15C5·4H₂O生成。对所生成的络合物通过了红外尤谱和化学分析,考查了所得固态络合物的水合度及其与后处理条件的关系。为在乙睛中合成该络合物,合理选择盐、醚摩尔比和后处理条件,提供了科学依据.首次发现并获得了相对稳定形式的La（NO₃）₃·B15C5·2H₂O,初步研究了该络合物的物理性质和热分解过程。更多还原

【Abstract】 The solubilities of the La（NO₃）₃•4H₂O-B15C5-CH₃CN ternary system at 25℃ have been determined by the semimicro method to study phase equilibrium, and the refraction indexes of the saturated solutions have also been determined for this system. The results indicate that there is only one complex La（NO₃）3B15C5 ·4H₂O formed. It has ruled out the possibility forming any other complex species with different stoichiometry. A relatively stable complex species La（NO₃）3·B15C5·2H₂O was obtained for the first time when the complex La（NO₃） 3B15C5·4H₂O was isolated from the solvent CH₃CN and dried in a vacuum desiccator with P₂O₆. The composition of this complex has been determined by chemical analysis and infrared spectra. Some physical properties and thermal decomposition products of this complex have been studied too.更多还原