Synthesis,spectral and thermal behavior of some new four coordinated complexes

A new symmetric bidentate schiff base n,n' bis(4-florobenzal-dehydene)-1,2-diaminoethane(l) and its complexes with general formula mlx2 (m= zn(ii),cd(ii) and hg(ii) and x=chloride,bromide,iodide,thiocyanate and azide) have been prepared. the ligand and complexes have been established by microanalysis,electronic,ft-ir,1h and 13c nmr spectra,and by molar conductivity measurements. all compounds are non-electrolytes in chloroform or dmso-d6. the thermal behavior of the complexes shows weight loss by decomposition of the anions and ligand segments in the subsequent steps. some activation thermodynamic parameters such as e*,δh*,δs* and δg* were calculated from thermal analysis. © 2012 hindawi publishing corporation.