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化学学报
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化学学报 ›› 1966, Vol. 32 ›› Issue (1): 94-97. 上一篇    下一篇

研究简报

水溶液中水杨酸铜络合物的组成和稳定性的研究——Ⅰ.过量金属中和曲线法

杨秀岑   

  1. 四川医学院医学化学教研组
  • 投稿日期:1965-01-27 发布日期:2013-06-03

STUDIES ON THE COMPOSITION AND STABILITY OF COMPLEXES OF COPPER (Ⅱ) WITH SALICYLIC ACID IN AQUEOUS SOLUTION——Ⅰ. pH-TITRATION METHOD WITH THE METALLIC ION IN EXCESS

YANG Hsiu-Chin   

  1. Department of Medicinal Chemistry, Szechuan Medical College
  • Received:1965-01-27 Published:2013-06-03

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水杨酸络合物在分析上有用[14-3],对络合物形成的研究也有一定的意义[4a],不过这一类络合物的络合反应还有一些问题未阐明[4a],关于水杨酸铜络合物,文献上已有不少的报导,但意见不一致.A.K.Бабко[5]根据Spacu等对晶体组成的研究结果[6],认为水溶液中只形成CuSal和CuSal22-(H2Sal代表水杨酸),并由光度法测得其逐级不稳定常数分别是10-6.3;Pecci等[7],Укше等对于该体系络合质点组成的看法与Бабко一致**.

Two solutions,in one of which Cu2+: H2Sal*=10:1,and in the other,20:1,were subjected to pH-titrations with μ≈0.03 at 20±0.5℃.The stability constants of CuSal and CuHSal+ have been calculated from the results thus obtained by the method of Schwarzenbach.The logarithm of the stability constant of CuSal was found to be 10.5.This figure agrees very well with those obtained by other authors with different methods.The fact that the stability constant of CuHSaI+ turned out to be negative would be an indication of the absence of this cation in aqueous solution under the experimental circum- stances.