Potentiometric Studies on the Complexes of Some Bivalent Metal Ions with N-[2-Hydroxy-1-naphthalidene]-cyclohexylamine

Department of Chemistry, Ramnarain Ruia College, Matunga, Bombay-400 019

Manuscript received 25 July 1983, accepted 3 May 1984

Potentiometric studies have been carried out on metal complexes or Cu^II, Ni^II_, Co^II, Cd^II with N-[2-hydroxy-1-naphthalidene)-cyclohexylamine. The formation constants (\(\mathcal{p}\)K₁ and \(\mathcal{p}\)K₂) of the reagent and the dissociation constants of its metal complexes have been determined by Bjerrun method at 30 ± 0.1^o and at ionic strength 0.1 M in 3 : 1 (v/v) dioxane-water medium. The order of stability constants of the chelates is
found to be Cn^II > Co^II> Ni^II > Cd^II.