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Linear free energy relationships between stability of complex and basicity of ligand: VII. The copper(II)‐heteronuclear aromatic base‐aminoacid ternary systems
Author(s) -
RongTi Chen,
Chen Y. T.,
HuaKuan Lin
Publication year - 1986
Publication title -
acta chimica sinica english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 0256-7660
DOI - 10.1002/cjoc.19860040302
Subject(s) - chemistry , heteronuclear molecule , ternary operation , stability constants of complexes , ligand (biochemistry) , copper , ternary complex , phenanthroline , base (topology) , crystallography , inorganic chemistry , stereochemistry , organic chemistry , nuclear magnetic resonance spectroscopy , receptor , mathematical analysis , biochemistry , enzyme , mathematics , computer science , aqueous solution , programming language
Abstract The formation constants of ternary mixed ligand complex compounds formed from Cu(II)‐2,2′‐bipyridyl (bipy) with N ‐( para ‐substituted phenyl) glycines ( p RPhG), Cu(II)‐1,10‐phenanthroline (phen) with N ‐( meta ‐substituted phenyl) glycines ( m RPhG), Cu(II)‐bipy/phen with some α‐aminoacids (αA) have been determined by pH method at 25°C in the presence of 0.10 M NaClO 4 . It was found that linear free energy relationships do exist between the stability of ternary complex compounds and the base strengths of the ligands in all four ternary systems investigated. The stability of the ternary complex compounds was discussed in terms of Δlog K M and log X values. It was found again that linear relationships exist between Δ log K M , log X and p K 2 in the Cu(II)‐phen‐ m RPhG ternary system.