Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (09): 841-846.doi: 10.3866/PKU.WHXB19940914

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Linear Free Energy Relationships of Complexes(XIX)

Xian Jing-Chun, Zhu Shou-Rong, Lin Hua-Kuan, Chen Rong-Ti   

  1. Department of Chemistry,Nankai University,Tianjin 300071
  • Received:1993-04-30 Revised:1993-06-25 Published:1994-09-15
  • Contact: Zhu Shou-Rong

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Abstract:

The stability constants of 5-substituted phenanthroline-12-(2'-hydroxy 1-5substituted benzy1)-1,4,7,10-tetraazacyclotr and copper(Ⅱ) ternary mixed ligand complex compounds were determined by pH method at 25.0±0.1 ℃ in the presence of 0.1 mol•dm-3KNO3. The form of coordination macrocyclopolyamine ligandcopper(Ⅱ)-5-substituted phenanthroline in aqueous solution were studied. The formation of d-π back bonding between copper(Ⅱ ) and nitrogen heteronuclear aromatic base has been proved. The tendency of stability of the ternary complexes have been explained by electron effects and d-π back bonding.

Key words: Stability of complexes, Macrocyclic dioxotetraamine, 5-Substituted phenanthroline, Linear free energy relationships