Abstract
The stability constants of ternary complexes containing copper(II), 2,2′-dipyridyl and cyclopropane-1,1-dicarboxylic, cyclobutane-1,1-dicarboxylic and cyclopentane-1,1-dicarboxylic acids, were obtained by potentiometric titrations. The stability order found for these complexes is discussed in terms of ring size influence upon the chelation of the dicarboxylate dianions to the system Cudip. It is suggested that the electronic and geometric characteristics of the strongest ligand drive the coordination of the second one.
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