Cezar Spinu, Angela Kriza, Lacramioara Spinu

University of Craiova, Faculty of Chemistry, Department of  Inorganic Chemistry
University of Bucharest, Faculty of Chemistry, Department of  Inorganic Chemistry
National College ,,Fratii Buzesti’’ Craiova
 
 

ABSTRACT

Metal complexes ML2Cl2, where M is FeII, CoII, NiII, CuII, ZnII and CdII and L is Schiff base formed by condensation of 2-thiophenecarboxaldehyde and 2-aminothiazole, N-[2-thienylmethylidene]-2-aminothiazole (TNATZ), have been prepared and characterized  by elemental analysis, magnetic and spectroscopic measurements. IR and NMR spectra show that the nitrogen of the azomethine group and sulphur of the thiophene ring take part in coordination. Magnetic, Mössbauer, ESR and electronic spectral studies show a distorted octahedral structure for the Fe(II) complex, a square-planar geometry for Ni(TNATZ)2Cl2 and Cu(TNATZ)2Cl2 complexes and a tetrahedral geometry for Co(II), Zn(II) and Cd(II) complexes. Conductance measurements suggest the 1:2 electrolytic nature of the complexes, with the exception the of the Fe(TNATZ)2Cl2 compound.