作者:K.N. Mehrotra、Mamta Jain
DOI:10.1006/jssc.1996.0088
日期:1996.2
The physicochemical characteristics of chromium soaps (myristate and stearate) were investigated in the solid state (thermal, X-ray, and IR measurements) and in solutions (spectrophotometric measurements). The thermal measurements showed that the decomposition of chromium soaps is a two-step process. The soap decomposed into chromium oxycarboxylate, ketone, and carbon dioxide in the first step and
在固态(热,X射线和红外测量)和溶液(分光光度测量)中研究了铬皂(肉豆蔻酸酯和硬脂酸酯)的理化特性。热测量表明,铬皂的分解是一个两步过程。在第一步将皂分解为羟基羧酸铬,酮和二氧化碳,然后在第二步中将中间体羟基羧酸酯进一步分解为三氧化铬。结果表明,第二步动力学为零级,第一步和第二步的活化能值在6-7和17-18 kcal mol -1范围内, 分别。X射线衍射结果表明,这些皂具有双层结构,其分子轴稍微向基面倾斜。红外结果表明,脂肪酸通过两个脂肪酸分子之间的氢键结合而存在二聚体结构,而铬皂中的金属-氧键不是纯离子键而是具有相当的共价特性。分光光度法测量的结果也证实了铬皂在二氯甲烷溶液中的某种共价性质。