Synthesis and characterization of uranium(IV) complexes with Schiff bases

A few complexes of uranium(IV) with 3-substituted-4-amino-5- mercapto-1,2,4 -triazole Schiff bases have been synthesized in dry benzene under nitrogen atmosphere. Elemental analyses show that the complexes have 1:1 stoichiomet ry of the type [U(OAc)(4)LH]. The bending of the ligands has been inferred from IR spectroscopy. Magnetic moments obtained at room temperature are low er than spin-only value. The lower magnetic moment values may be attributed for the metal-metal interaction probably due to magnetic exchange in a dim eric structure. The electronic reflectance spectral data suggested an octah edral geometry for these uranium(IV) complexes. The kinetic and thermodynam ic parameters were computed from the thermal decomposition data using Broid o's method.