Acta Chimica Sinica ›› 1999, Vol. 57 ›› Issue (3): 298-304. Previous Articles     Next Articles

Original Articles

冠醚化单和双Schiff碱的合成及其钴(II)配合物的氧加合性能

李建章;秦圣英;李仲辉;阳华   

  1. 四川大学化学系.成都(610064)
  • 出版日期:1999-03-15 发布日期:1999-03-15

Synthesis of crowned mono- and bis-schiff bases and dioxygen affinities of their cobalt(II) complexes

Li Jianzhang;Qin Shengying;Li Zhonghui;Yang Hua   

  1. Sichuan Univ, Dept Chem.Chengdu(610064)
  • Online:1999-03-15 Published:1999-03-15

Four crowned mono- and bis-Schiff bases, 4'-(2- hydroxyphenylmethylideneimino) benzo-15-crown-5 (L^1H) and 4', 5'-bis (2-hydroxyphenylmethylideneimino) benzo-15-crown-5 (L^4H~2) as well as their substituted derivatives L^2H, L^5H~2 were prepared from benzo- 15-crown-5 via nitration, reduction, and condensation. Equilibrium constants and thermodynamic constants ΔHⅲ, ΔSⅲ for oxygenation of these crowned cobalt(II) Schiff base compleses were measured. The influence of ligand structure and basicity of axial ligand on the affinities of the complexes for dioxygen was discussed in comparison with uncrowned analoques.

Key words: CROWN ETHER, SCHIFF BASE, COBALT COMPLEX, NITRATION, REDUCTION, CONDENSATION

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