Coordination Compounds of Zirconium(lV) with Thiosemicarbazones

Abstract The reactions of bis(cyclopentadienyl)dichloro zirconium(IV) with thiosemicarbazones have been studied in tetrahydrofuran in the presence of triethylamine or n-butylamine at room temperature. Complexes of the types : [(C5H5)2Zr(TSC)Cl], [(C5H5)Zr(TSC)3] and [(C5H5)2Zr(TSC')] (where TSCH is the monobasic thiosemicarbazone derived by the condensation of thiosemicarbazide with cinnamal-dehyde, benzaldehyde, acetophenone or p-hydroxy acetophenone and TSC'H2 is the dibasic thiosemicarbazone derived from thiosemicarbazide and salicylaldehyde)have been characterized by elemental analysis, magnetic susceptibility and conductance measurements and by electronic, ir. and 1H n.m.r. spectroscopy. Structures are proposed for these complexes.