高等学校化学学报

高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (4): 306.

• 研究简报 • 上一篇    下一篇

以氧、氮为配位原子的某些铅(Ⅱ)混合配体化合物的稳定性研究(Ⅱ)

张锋, 刘祁涛   

  1. 辽宁大学化学系
  • 收稿日期:1985-09-25 出版日期:1987-04-24 发布日期:1987-04-24

Studies on Stabilities of Some Lead(Ⅱ) Mixed Ligand Complexes Containing Oxygen and Nitrogen as the Coordination Atom(Ⅱ)

Zhang Feng, Liu Qitao   

  1. Department of Chemistry, Liaoning University, Shenyang
  • Received:1985-09-25 Online:1987-04-24 Published:1987-04-24

PDF (PC)

被引次数

16

摘要： 前文报告了Pb(Ⅱ)-en-Ox1:1:1型混合配合物的稳定性。虽然稳定常数(logβ)高于统计效应的期望值,但其ΔlogK却是较大的负值。一些共轭氮杂环碱如2,2′-联吡啶、邻二氮菲等氮氮型配体,能与氧氧型配体协同作用,同过渡金属形成相当稳定的三元混合配合物,其ΔlogK可为正值,即共轭氮杂环碱在金属上的配位可促进氧氧型配体的配位。但对于非过渡金属,是否也有类似的情况则尚无定论。

Abstract: The stability constants of 1:1:1 mixed ligang complexes of Pb(Ⅱ) with 2,2' -dipyridyl(dipy) or 1,10-phcnanthrolinc(phcn) as the first ligand,and malo-natc (mal) as the second ligand were determined at 25±0.1℃ with ionic strength 0.10 (maintained by KNO2) by using potcntiometric method. The △logK and logX of these mixed ligand complexes and their statistical expected values were calculated. The results showed that the above mixed ligand complexes have an enhanced stability.The reasons that lead to this results are discussed.

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