Abstract

The copper(II) complexes of the GlyAsp (glycyl— l-aspartic acid), GlyAsn (glycyl— l-asparagine), GlySer (glycyl— l-serine), GlyThr (glycyl— l-threonine), GlyPhe (glycyl— l-phenylalanine), SerGly ( l-serylglycine), ThrGly ( l-threonylglycine), PheGly ( l-phenylalanylglycine) and GlyGly (glycylglycine) groups as a reference were studied by pHmetric, spectrophotometric and ESR methods at high pH and high ligand excesses (up to a metal-to-ligand ratio of 1:50). The influence of the side-chain donor groups and the aromatic ring on the competitive formation of the mixed hydroxo complex [Cu(AH −1)OH]and the deprotonated complex [Cu(AH −1) 2] was evaluated.

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