Stability Constants of Orthocarboxyphenyl di(p-tolyl) arsine Complexes

Department of Chemistry and Biochemistry, Punjab Agricultural University, Ludhiana Manuscript received 30 August 1974; accepted 2 May 1975 The proton-ligand stability constant of Orthocarboxyphenyl di(p-tolyl) arsine and the stepwise stability constants of its complexes with Ni(II), Cu(II), Hg(II), UO2 (II), La(III) and Ce(III) have been determined in ethanol-water (70 : 30, v/v) system by potentiometric method at 30° and 40° at μ = 0.1 M. The values of log K1H are 6.38 at 30° and 6.26 at 40°. The order of stability constants for 1 : 1 and 1:2 complexes has been found to be Hg(II) > UO2 (II) > Cu(II) > whereas La(III) > Ce(III) is the order for 1 : 1 complexes.

Keywords

Metal Ligand System, metal complexes, proton-ligand

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