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A Comparative Study of Stabilities and Coordination Modes of β-Alaninephosphonic Acid in Copper(II) Heteroligand Complexes with Ethylenediamine, Diethylenetriamine or N,N,N',N',N″-Pentamethyldiethylene Triamine in Aqueous Solution

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Solution equilibrium studies on Cu(2+)-L(1)-L(2) ternary systems have been performed by pH-potentiometry, UV-Vis spectrophotometry and EPR methods {where L(1) corresponds to a polyamine such as ethylenediamine (en), diethylenetriamine (dien), N,N,N',N',N″-pen... ...