Abstract

Metal complexation equilibria in the binary complexing systems of the typeM−L [M=Cu(II), Ni(II), Co(II), Zn(II), Cd(II), and UO2(VI);L=AZN=8-azaguanine] have been examined potentiometrically. The work has further been extended to investigating the ternary complexing systems of the typeM−A−L [A=2,2′-bipyridine, 1,10-phenanthroline or nitrilotriacetic acid]. Measurements were done at 25°C and at an ionic strength of 0.1M (NaClO4) in 50% (v/v) aqueous ethanol medium. Stabilities of the ternary complexes as compared to those of the corresponding binary complexes ofAZN are also discussed.

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