CONDUCTOMETRIC STUDY OF CATIONIC AND ANIONIC COMPLEXES IN PROPYLENE CARBONATE
CONDUCTOMETRIC STUDY OF CATIONIC AND ANIONIC COMPLEXES IN PROPYLENE CARBONATE
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DOI：
10.1007/bf00652547
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发表时间：
1990-12-01
影响因子：
1.2
通讯作者：
SALOMON, M
中科院分区：
文献类型：
--
作者：
SALOMON, M
电导率数据用于确定热力学复合物形成常数的情况下，其中初始电解质和络合的电解质形成离子对。 用本文所述的方法，从电导数据计算了Li+、Na+和K+与冠醚18-冠-6以及Li+与配体三苯基氧化膦在碳酸丙烯酯中的络合物形成常数。 本文还用电导法研究了AgBr在碳酸丙烯酯-溴化正四丁基铵溶液中的络合作用。 这些研究的结果表明，离子配对不应被忽视，即使在高介电常数的溶剂，如碳酸丙烯酯，和离子对缔合常数相关以及阳离子冠醚分子构象的结构研究。
Conductivity data are used to determine thermodynamic complex formation constants for cases in which both the initial electrolyte and the complexed electrolyte form ion pairs. Using the method described in the text, the complex formation constants of Li+, Na+ and K+ with the crown ether 18-crown-6 and of Li+ with the ligand triphenylphosphine oxide in propylene carbonate have been evaluated from conductance data. The complexation of AgBr in propylene carbonate solutions of n-tetrabutylammonium bromide has also been studied by the measurement of mo lar conductivities. The results of these studies indicate that ion pairing should not be neglected, even in high permittivity solvents such as propylene carbonate, and that the ion pair association constants correlate well with structural studies on cation-crown ether molecular conformations.