摘要
本文通过对反应热的测定来计算反应热力学函数的改变量(△H,△S,△G,Ka等),探讨系列醇类溶剂对二环己基18冠—6与Hg^(+2)配合反应能力的影响。实验结果表明,溶剂极性对配合反应有较大的影响,随着醇类分子中烷链的增长,配合反应的生成自由能△G成倍增加;当醇类溶剂烷链给电子效应增大时,配合反应的平衡常数减小,平衡常数与醇类溶剂的诱导效应指数(Ⅰ)之间符合很好的直线关系。
In this paper, coordination reaction of dicyclohexyl—18—crown—6 with Hg^(+2) in different solvents of ROH at 25℃ has been studied by thermal measurement. The stability constants enthalpies and entropies of coordination reaction have been calculated directly for the same crown coordination reaction in a series of ROH solvents. It has been foun that the stability constants of reaction, conform well to the rule of homologous linearity and that the equation of linearity is: Log K=0.43×10^(-3)+6.54 This result shows that significant effect of solvent polarity on crown coordination processes is present.
出处
《郑州大学学报（自然科学版）》
CAS
1990年第1期76-79,共4页
Journal of Zhengzhou University (Natural Science)
关键词
冠醚
HG^2+
配合反应
溶剂
dicyclohexyl—18—crown—6, thermalmeasurement, thermodynamic function, Stability constants of reaction.
