Ternary Cu(II) complexes involving N-(1-naphthyl)ethylenediamine, ethylenediamine (N-N donors) and a series of amino acids (N-O− donors)
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The dissociation constants for N-(l-naphthyl)ethylenediamine (NEN) and the formation constants for binary (ML) and ternary metal complexes (MLA), where M = Cu(II), L = alanine, phenylalanine, tryptophan, lysine, arginine, serine, threonine, aspartic acid or histidine and A = NEN or ethylenediamine (EN) have been determined by pH titrations and are reported at 35°C (gm = 0.2 M KNO3). The relative stability of the ternary complexes are discussed in terms of statistical effects and the nature of ligands in the coordination sphere of the metal ion.
KeywordsTernary complexes N-(1-naphthyl)ethylenediamine ethylenediamine aminoacid-copper complexes
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