SYNTHESIS, CHARACTERIZATION, SOLID-STATE CONDUCTANCE, THERMAL STUDIES, X-RAY-DIFFRACTION AND BIOLOGICAL-ACTIVITY OF CHROMIUM(III) COMPLEXESWITH ACYLHYDRAZINES

Chromium(III) complexes of the type [Cr2X2]X.nH2O, where L = benzoylhy drazine (BH), isonicotinoylhydrazine (INH), salicyloylhydrazine (SH), malonoyldihydrazine (MDH) and oxaloyldihydrazine (ODH); X CH3COO- (OAc ), SCN- or 12 SO42- and [Cr(BH)3]X3.nH2O, where X CH3COO- (OAC) or SCN -, were prepared and characterized with the help of elemental analyses , magnetic moments, molar-and solid state conductances, thermal (TG an d DTA) studies, IR and electronic spectral data. The complexes, which are insoluble in common organic solvents, decompose above 300-degrees- C and are high spin octahedral with the mono-acylhydrazines bonding th rough >C=O and -NH2 and the dihydrazines only through the two -NH2 gro ups. The complexes show multistep exothermic decomposition patterns. X -ray powder diffraction studies of selected complexes yield patterns i ndicative of possible polymeric structures. The ligands as well as the ir complexes show some antifungal and antibacterial activity.