| 介质对配合物稳定性的影响I.Cu(SCN)^+-NaNO3-C2H5OH-H2O体系 |
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| 引用本文： | 梁春馀,杨家振,刘祁涛,杨晓秋.介质对配合物稳定性的影响I.Cu(SCN)^+-NaNO3-C2H5OH-H2O体系[J].化学学报,1987,45(8):760-765. |
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| 作者姓名： | 梁春馀 杨家振 刘祁涛 杨晓秋 |
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| 作者单位： | 辽宁大学化学系 |
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| 摘 要： | 本文用分光光度法测定了25℃时配阳离子Cu(SCN)^+在乙醇-水介质中的稳定常数.乙醇在混合溶剂中的重量百分数为0,5,10,15,20和25.用NaNO3调节溶液离子强度I=0.2--2.0mol.dm^-^3.实验的pH=1.5--1.6.本文提出了基于Pitzer方程式的曲线拟合法,确定混合溶剂中配合物的热力学稳定常数.讨论了该常数和一级介质效应与溶液组成和介电常数的关系.
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| 关 键 词： | 乙醇 水 活性系数 介质 稳定常数 硫氰酸盐 铜络合物 电解质 四元系 硝酸钠 |
The influence of medium on stability of coordination compounds I.The system Cu(SCN)[+]-NaNO3-C2H5OH-H2O |
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| LIANG CHUNYU,YANG JIAZHEN,LIU QITAO,YANG XIAOQIU.The influence of medium on stability of coordination compounds I.The system Cu(SCN)[+]-NaNO3-C2H5OH-H2O[J].Acta Chimica Sinica,1987,45(8):760-765. |
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| Authors: | LIANG CHUNYU YANG JIAZHEN LIU QITAO YANG XIAOQIU |
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| Abstract: | The stability constants of Cu(SCN)+ in the Cu(SCN)+-NaNO3-C2H5OH-H2O system were determine by spectrophotometric measurements at 25?for 0, 5, 10, 15, 20 and 25 wt.% alcohol in mixed solvents. The total ionic strength of the solution is 0.2-2.0 mol.dm-3, and pH = 1.5-1.6. On the basis of Pitzer's theory, a method of determing thermodn. stability constants of coordination compounds in mixed solvents by curve fitting technique is proposed. The stability constants of Cu(SCN)+ in mixed solvents are correlated with composition and dielec. constant of the solvent mixture |
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| Keywords: | ETHANOL WATER ACTIVITY COEFFICIENT MEDIA STABILITY CONSTANT THIOCYANATE COPPER COMPLEX ELECTROLYTE QUATERNARY SYSTEM SODIUM NITRATE |
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