Abstract
Seven new complexes where the chelate ring was nucleophilically substituted were synthesized by the reactions of asymmetrical tetradentate Schiff base complexes of nickel(II) and copper(II) with benzenethiols and thiolycollic ehtyl ester. They were characterized by means of elemental analyses, electronic and 1H-NMR spectra. Kinetics of the nucleophilic ring-substitution reactions were spectrophotometrically studied in a benzene solution. A four-centered intermediate is proposed for the reactions.
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