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高等学校化学研究 ›› 2005, Vol. 21 ›› Issue (1): 8-11.

• Articles • 上一篇    下一篇

Studies of the Intramolecular Aromatic-ring Stacking Interactions in the Ternary Platinum(Ⅱ) Complexes

SUN Hong-liang   

  1. Research Center of Chemistry & Analysis, Zhejiang Gongshang University, Hangzhou 310035, P. R. China
  • 收稿日期:2003-09-24 出版日期:2005-01-24 发布日期:2011-07-27
  • 基金资助:

    Supported by the Foundation of Academy Leader of Zhejiang Gongshang University(No.19972002).

Studies of the Intramolecular Aromatic-ring Stacking Interactions in the Ternary Platinum(Ⅱ) Complexes

SUN Hong-liang   

  1. Research Center of Chemistry & Analysis, Zhejiang Gongshang University, Hangzhou 310035, P. R. China
  • Received:2003-09-24 Online:2005-01-24 Published:2011-07-27
  • Supported by:

    Supported by the Foundation of Academy Leader of Zhejiang Gongshang University(No.19972002).

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摘要： The stability constants of some ternary mixed-ligand complexes, Pt(Phen)(CA)+, where Phen=1,10-phenanthroline and CA- =carboxylate, were determined by means of potentiometric pH titration in aqueous solutions(I=0.1 mol/L, KNO3;25 ℃), and the stability of them was compared with that of the corresponding binary complexes.It was revealed that the ternary complexes containing phenylalkane carboxylates ligands(PCA-) are much more stable than those formed with formate and acetate.The results indicate that there exist the intramolecular aromatic-ring interactions between the phenanthroline ring of Phen and the phenyl moiety of ligand PCA- in the ternary mixed-ligand Pt(Phen)(PCA)- complexes.The extent of the stacking interactions, which depends on the number of methylene groups between the phenyl moieties and the coordinated phenylalkane carboxylate groups, was calculated.The best-fitted stack was obtained for the complexes with 2-phenylacetate and 3-phenylpropionate as the ligands.

关键词: Platinum(Ⅱ), Mixed-ligand complex, Aromatic-ring stacking, Stability constant

Abstract: The stability constants of some ternary mixed-ligand complexes, Pt(Phen)(CA)+, where Phen=1,10-phenanthroline and CA- =carboxylate, were determined by means of potentiometric pH titration in aqueous solutions(I=0.1 mol/L, KNO3;25 ℃), and the stability of them was compared with that of the corresponding binary complexes.It was revealed that the ternary complexes containing phenylalkane carboxylates ligands(PCA-) are much more stable than those formed with formate and acetate.The results indicate that there exist the intramolecular aromatic-ring interactions between the phenanthroline ring of Phen and the phenyl moiety of ligand PCA- in the ternary mixed-ligand Pt(Phen)(PCA)- complexes.The extent of the stacking interactions, which depends on the number of methylene groups between the phenyl moieties and the coordinated phenylalkane carboxylate groups, was calculated.The best-fitted stack was obtained for the complexes with 2-phenylacetate and 3-phenylpropionate as the ligands.

Key words: Platinum(Ⅱ), Mixed-ligand complex, Aromatic-ring stacking, Stability constant