Axial ligation constants of copper(II) macrocyclic tetra-amine complexes

Authors:
  • BLBih-Fong Liang
    Bih-Fong Liang
  • YTYaw-Kuen Tsay
    Yaw-Kuen Tsay
  • CCChung-Sun Chung
    Chung-Sun Chung
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Abstract
The effect of solvent on the axial ligation constants of red (C-meso- and red (C-rac-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetra-azacyclotetradecane)copper(II) complexes with Cl–, Br–, I–, and N3 – in dimethylformamide, dimethyl sulphoxide, methanol, and water has been studied by spectrophotometric techniques. The sequence for the axial ligation constants varies in the order K H2O Kdmso < Kdmf < KMeOH. A linear relationship between the relative free energies of solvation for the anions in organic and aqueous solvents and the relative free energies of ligand addition to copper(II) macrocyclic complexes in these solvents was obtained.
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