Synthesis and Characterization of Some Oxozirconium(IV) Complexes of Semicarbazones and Thiosemicarbazones

Abstract

In present studies, oxozirconium(IV) complexes of 4-[N-(2’,4’- dichlorobenzalidene)amino]antipyrine semicarbazone (DCBAAPS), 4-[N-(4’-ethlbenzalidene)amino]antipyrine semicarbazone (EBAAPS), 4-[N-(2’,4’-dimethylbenzalidene)amino]antipyrine semicarbazone (DMBAAPS), 4-[N-(4’-ethylbenzalidene)amino]antipyrine thiosemicarbazone (EBAAPTS), 4-[N-2’,4’-dimethylbenzalidene) amino]antipyrine thiosemicarbazone (DMBAAPTS), with the general composition ZrO(L)Cl₂.H₂O (L = DCBAAPS, EBAAPS, DMBAAPS, EBAAPTS or DMBAAPTS) have been synthesized and characterized. The conductance values of all the ZrO²⁺ complexes are ionic in nature and both the chloro ions are present outside the coordination sphere. The infrared studies reveal the tridentate (N, N, O) nature of semicarbazones and (N, N, S) nature of thiosemicarbazones. The coordination number of zirconium(IV) in these complexes is found to be five.