应用化学 ›› 1996, Vol. 0 ›› Issue (1): 47-49.

• 研究论文 • 上一篇    下一篇

配体结构对三元混配配合物分子内芳环堆积作用的影响

孙洪良   

  1. 杭州商学院食品系 杭州 310035
  • 收稿日期:1995-05-25 修回日期:1995-09-25 出版日期:1996-02-10 发布日期:1996-02-10
  • 基金资助:
    国家自然科学基金

Effect of Ligand Structure on Intramolecular Aromatic Ring Stacking in Ternary Mixed-Ligand Complexes

Sun Hongliang   

  1. Department of Food, Hangzhou Institute of Commerce, Hangzhou 310035
  • Received:1995-05-25 Revised:1995-09-25 Published:1996-02-10 Online:1996-02-10

摘要: 用pH电位滴定法测定了含1,10-邻菲咯啉(Phen)和羧酸(CA)配体的三元混配配合物Pd(Phen)(CA)+体系的稳定常数,比较和讨论了各种三元混配物之间的稳定性差异。实验结果表明:在三元混配物Pd(Phen)(PCA)+中(PCA,苯基羧酸)存在分子内芳环堆积作用,堆积程度依赖于苯基和配位的羧酸根之间的亚甲基数目,最适宜堆积的苯基羧酸是2-苯乙酸和3-苯丙酸。

关键词: 钯(Ⅱ), 混配配合物, 芳环堆积, 稳定常数

Abstract: The stability constants of the binary complexes Pd(CA)+ and the ternary complexes Pd(Phen)(CA)+ have been determined by potentiometric pH titration.The stability difference among the ternary mixed-ligand complexes has been discussed.The experimental results indicate the existence of intramolecular aromatic ring stacking interactions in the ternary mixed-ligand complexes Pd (Phen)(PheCA)+.The extent of stacking depends on the number of methylene groups between the phenyl moiety and the coordinated carboxylate groups.The best fit stacking is reached with 2-phenylacetate and 3-phenylpropionate.

Key words: palladium(Ⅱ), mixed-ligand complex, aromatic ring stacking, stability constant