Formation Constants of the Complexes of 2-Hydroxy-1-Naphthaldoxime with Some Trivalent Metal Ions and UO22+

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

Manuscript received 4 August 1977, revised 14 December 1977, accepted 10 April 1978

Potentiometric studies have been carried out on metal complexes of \(UO_2^{2+}\), Y³⁺, Pr³⁺, Gd³⁺, Dy³⁺ and Nd³⁺ with 2-hydroxy-1-napbthaldoxime. The proton-association constant of the reagent and the formation constants of its metal complexes have been determined by Bjerrum's method at 25°±0.1. The departure from the electrostatic bond between metal and donor atoms of the reagent has been attributed to the size of the hydrated metal ions of rare earths.