Solvation and complexation of copper (II) and chloride ions in 2,2,2-trifluoroethanol–dimethyl sulphoxide mixtures
作者:Honoh Suzuki、Shin-ichi Ishiguro、Hitoshi Ohtaki
DOI:10.1039/f19898502587
日期:——
formation of copper(II) chloro-complexes has been studied by calorimetry and spectrophotometry in various 2,2,2-trifluoroethanol (TFE)–dimethyl sulphoxide (DMSO) mixtures at 25 °C. It was shown that as the mole fraction of TFE, x, in the mixtures increased, the formation constant of [CuCl]+ gradually decreased to x= 0.8. The result is contrary to that obtained for acetonitrile (AN)–DMSO mixtures. This is
在25°C下,通过量热法和分光光度法研究了在各种2,2,2-三氟乙醇(TFE)-二甲基亚砜(DMSO)混合物中的铜(II)氯配合物的形成。结果表明,随着混合物中TFE摩尔分数x的增加,[CuCl] +的形成常数逐渐降低至x = 0.8。结果与乙腈(AN)-DMSO混合物获得的结果相反。这归因于TFE-DMSO混合物中[CuCl] +形成的熵降低,而DMSO含量降低的AN-DMSO混合物中熵增加。[CuCl] +形成的相应焓在TFE-DMSO混合物以及AN-DMSO混合物的各种溶剂组成中,几乎保持不变。在TFE-DMSO和AN-DMSO混合物中[CuCl] +的形成熵的变化趋势可能是通过本体中溶剂分子之间的不同分子间相互作用来解释的。