Microwave synthesis,spectral,thermal,3D molecular modeling analysis and antimicrobial activities of some transition metal complexes of Schiff bases derived from 5-bromosalicylaldehyde

The coordination complexes of cr(iii),co(ii),ni(ii) and cu(ii) derived from 5-bromosalicylidene-2-chloro-4-nitroaniline (hl1) and 5-bromosalicylidene-2-amino-5-chlorobenzophenone (hl2) have been synthesized by conventional as well as microwave methods. these compounds have been characterized by elemental analysis,ft-ir,fab-mass,molar conductance,electronic spectra,1h-nmr,esr,magnetic susceptibility,electrical conductivity and thermal analyses. fab-mass and thermal data show degradation pattern of the complexes. the thermal behavior of metal complexes shows that the hydrated complexes lose water molecules of hydration in the first step; followed by decomposition of ligand molecules in the subsequent steps. the computational studies of cu(ii) complex of 5-bromosalicylidene-2-chloro-4-nitroaniline have also been done. solid state electrical conductivity studies reflect the semiconducting nature of the complexes. the schiff base and metal complexes show a good activity against the gram-positive bacterium; staphylococcus aureus and gram-negative bacterium; escherichia coli and fungi aspergillus niger and candida albicans. © 2012 production and hosting by elsevier b.v.