title: Spectral studies on cobalt(II), nickel(II) and copper(II) complexes of naphthaldehyde substituted aroylhydrazones.
abstract: A series of new coordination complexes of cobalt(II), nickel(II) and copper(II) with two new aroylhydrazones, 2-hydroxy-1-naphthaldehyde isonicotinoylhydrazone (H(2)L(1)) and 2-hydroxy-1-naphthaldehyde-2-thenoyl-hydrazone (H(2)L(2)) have been synthesized and characterized by elemental analysis, conductance measurements, magnetic susceptibility measurements, (1)H NMR spectroscopy, IR spectroscopy, electronic spectroscopy, EPR spectroscopy and thermal analysis. IR spectra suggests ligands acts as a tridentate dibasic donor coordinating through the deprotonated naphtholic oxygen atom, azomethine nitrogen atom and enolic oxygen atom. EPR and ligand field spectra suggests octahedral geometry for Co(II) and Ni(II) complexes and a square planar geometry for Cu(II) complexes.
authors.affiliation: Department of Chemistry, Kirori Mal College, University of Delhi, Delhi 110007, India.
authors.forename: Pramod Kumar
authors.initials: PK
authors.lastname: Singh
authors.forename: Deo Nandan
authors.initials: DN
authors.lastname: Kumar
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D001391:Azo Compounds / Q000737:chemistry; D003035:Cobalt / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D006358:Hot Temperature; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D009281:Naphthalenes / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D013055:Spectrophotometry, Infrared / Q000379:methods*; D013882:Thiosemicarbazones / Q000737:chemistry
chemical_list: D000447:Aldehydes; D001391:Azo Compounds; D008024:Ligands; D009281:Naphthalenes; D013882:Thiosemicarbazones; C512188:azomethine; D003035:Cobalt; C009840:1-naphthaldehyde; D003300:Copper; D009532:Nickel; D010100:Oxygen