Preparation, structural elucidation and antimicrobial activity of complexes of some metal ions with 4-{1H-benzimidazol-2-ylethylideneamino}-6- methyl-3-thioxo-3,4-dihydro1,2,4-triazine-5(2H)-one (Hbethtr)

1 Department of Chemistry, NIT Patna, 800005, INDIA 2 Department of Chemistry, H. D. Jain College Ara, Veer Kuwar Singh University, INDIA 3 Department of Chemistry, Science College, Patna University, Patna-800005, INDIA _____________________________________________________________________________________ ABSTRACT: The complexes of Hbethtr with Mn II , Ni II , Co II , Cu II , Zn II , Cd II and Pd II of composition [M(bethtr)2] (M= Co II , Ni II , Cu II , Zn II and Cd II ) and M(Hbethtr)Cl2, (M= Pd II , Cu II or Ni II and Co II ) have been prepared, characterised and their structures have been proposed from the studies of magnetic susceptibility, electronic absorption and i.r spectra. The antibacterial activity of complexes has been studied against Escherichia Coli, Staphylococcus aureus, Salmonella typhi and antifungal activity against Aspergillus niger and Candida albicans. Cobalt(II) and copper(II) complexes were found more active against S.aureus and Candida albicans.