Peroxo complexes of uranium(VI) with N-benzoyl urea and related ligands: synthesis, characterization and antifungal activity

The peroxouranium(VI) complexes containing N-benzoyl urea and related ligands having composition (UO(O2)L-L(NO3)2).H2O (where L-L=N-benzoyl urea (NBU), N-benzoyl thiourea (NBT). N-benzoyl hydrazine (NBHz) and N-benzoyl hydroxylamine (NBHA)) are reported. The synthesized complexes have been characterized by various physico-chemical techniques, viz, elemental analysis, molar conductivity, magnetic susceptibility measurements, infra red, electronic, mass spectral and TGA/DTA studies. These studies revealed that the synthesized complexes are non-electrolytic and diamagnetic in nature. The ligands are bound to metal in a bidentate mode. Thermal analysis results provide conclusive evidence for the presence of water molecule in the complexes. Mass spectra confirm the molecular mass of the complexes. Antifungal activity of complexes revealed enhanced activity of complexes as compared to corresponding ligands. (author)