Abstract

Amit Kumar Saxena and Rajnish Saxena

Mixed ligand octahedral Titanium(III) complexes with the tridentate salicylaldehydesemi-, thiosemi- and isothiosemicarbazone and pyridine of general formula [TiIII(L1-3)(py)3]X(H2L1 = salicylaldehyde semicarbazone,X=[TiIICl3(py)]-, ClO4- .H2O, I- . 0.5 I2; H2L2 = salicylaldehyde thiosemicarbazone, X = [TiIICl3(py)]-,[TiIIBr3(py)]-, ClO4- . H2O, I3-; H2L3 = salicylaldehyde S-methylisothiosemicarbazone,X = [TiIIBr3(py)]-, ClO4- . H2O, BF4-) were synthesized. The tridentate coordination of all the three dianionic forms of the ligands involves the phenol oxygen,hydrazine nitrogen and the chalcogen (O or S) in case of salicylaldehyde semi-,thiosemicarbazone and the terminal nitrogen atom in the case of isothiosemicarbazone.For all the complexes, a meridial octahedral arrangement is proposed, which is a consequence of the planarity of the chelate ligand. The compounds were characterized by elemental analysis, molar conductivity, magnetic susceptibility, IR and electronic absorptionspectra. The thermal decomposition of the complexes was investigated by thermogravimetry, coupled TG-MS measurements and DSC.

mixed Ti(III) complexes; salicylaldehyde semi-; thiosemi-; isothiosemicarbazone; pyridine; Titanium Complexes with Semicarbazone and Thiosemicarbazone

[ View HTML Full Text]