title: Synthesis, spectral characterization and microbiological studies of Co(II), Ni(II) and Cu(II) complexes with some novel 20-membered macrocyclic hydrazino-1,2,4-triazole Schiff bases.
abstract: A series of Co(II), Ni(II) and Cu(II) complexes have been synthesized by template condensation of 2,6-diformyl-4-methylphenol and 3-substituted-4-amino-5-hydrazino-1,2,4-triazole with CoCl(2).6H(2)O, NiCl(2).6H(2)O and CuCl(2).2H(2)O chlorides in 2 + 2+2 molar ratio in ethanol. These complexes were characterized by elemental analyses, magnetic susceptibility, molar conductance, spectral (IR, Uv-Vis, ESR, (1)H NMR and FAB-mass), thermal, fluorescence and solid-state DC electrical conductivity studies. The observed molar conductance values indicate that they are non-electrolytes. Elemental analyses suggest the complexes to have 2:1 stoichiometry of the type [M(2)LX(2)] 2H(2)O (M = Co(II) & Cu(II), L = L(I)-L(IV) and X = Cl) and [Ni(2)LX(2)2H(2)O] 2H(2)O. The solid state DC electrical conductivity showed that the complexes were semiconducting. All the Schiff bases and their Co(II), Ni(II) and Cu(II) complexes were evaluated for their microbiological properties and some compounds showed promising results.
authors.affiliation: P.G. Department of Chemistry, Karnatak University, Dharwad, Karnataka, India.
authors.forename: Prakash Gouda
authors.initials: PG
authors.lastname: Avaji
authors.forename: Sangamesh Amarappa
authors.initials: SA
authors.lastname: Patil
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry*; D003035:Cobalt; D003300:Copper; D019216:Metals, Heavy / Q000737:chemistry* / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D009532:Nickel; D009942:Organometallic Compounds / Q000737:chemistry* / Q000494:pharmacology; D012545:Schiff Bases / Q000737:chemistry / Q000494:pharmacology; D013057:Spectrum Analysis; D014230:Triazoles / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D019216:Metals, Heavy; D009942:Organometallic Compounds; D012545:Schiff Bases; D014230:Triazoles; D003035:Cobalt; D003300:Copper; D009532:Nickel