Synthesis, physicochemical and antimicrobial studies of first row transition metal complexes with quinoline derivatives nitroquinolino (3,2-b)(1,5)benzodixazepine and nitroquinolino(3,2-b)(1,5)benzoxazepine

div align="justify">Metal complexes of Mn (II), Cu (II), Ni (II) & Co (II) with quinoline derivatives have been synthesized and characterized by elemental analysis, molar conductance, magnetic movement, electronic spectra, thermal analysis and IR spectral data. The molecular formula of complexes corresponds to [ML(NO3)2] where M = Mn ,Cu , Ni , Co , Zn , Fe, and Cr. The physicochemical and IR spectral data shows that the ligand coordinates to the metal ion in bidentate fashion (through the C=N and N-H groups). The antimicrobial studies of ligand and its metal, metal complexes have been screened for selected bacteria (E. Coli , S. typhi , B. subtilis and S. aureus) and fungi (A. flavous, A. niger, P. triticena and F. species). Antimicrobial studies shows that the Mn (II) complexes are more toxic than other metal complexes. Magnetic susceptibility measurements reveal octahedral geometry around the metal ion. The complexes were found to be non electrolyte in nature on the basis of low value of molar conductance