Synthesis and Spectral Properties of Dioxouranium(VI) Complexes of N-isonicotinamidio-p-anisalaldimine and N-isonicotinamido-p-dimethylaminobenzalaldimine†

Abstract

In the present work, the ligational behaviour of N-isonicotinamido-

p-anisalaldimine (INH-ANSL) and N-isonicotinamido-p-dimethylaminobenzalaldimine

(INH-PDAB) toward dioxouranium

(VI) salts were studied. The isolated complexes have the general

composition UO₂X₂·nL (X = Br^–, I^–, NCS^–, NO^–₃) or CH₃COO^–,

n = 2, X = ClO^–₄, n = 3 and L = INH-ANSL or INH-PDAB). All

these complexes were characterized by infrared, conductance, magnetic

moment, molecular weight data and elemental analyses. In

these complexes both the ligands behave as neutral bidentate ligand

coordinating through amido-oxygen and azomethinic-nitrogen

atoms. The electrical conductance indicates that except

UO₂(ClO₄)₂ complexes all the complexes are non-electrolytes,

while UO₂(ClO₄)₂·3L are 1 : 2 electrolytes. The probable coordination

number of U(VI) is either 8 or 10 depending on the nature of

anions. Thermal properties of the complexes are also discussed.