title: UV-visible spectroscopic study of the salicyladehyde benzoylhydrazone and its cobalt complexes.
abstract: Salicyladehyde benzoylhydrazone (SBH) has three groups suitable for forming coordination bond with transition metal. The UV-vis absorption spectra of SBH and its Co(II) complexes in various media were studied by using the deconvolution method. It is found that the structure of complex in solution is different from those in solid crystals. The nature of complexes in solution depends on acidity of the phenolic proton of SBH and on the medium. In neutral or slightly acid medium, the SBH is a non-charged bidentate ligand. And the "free" hydroxyl group on the SBH molecule makes it possible to form hydrogen bonds in solution. In basic medium, the SBH is a mono, negatively charged tridentates ligand.
authors.affiliation: Department of Chemical Engineering, Anhui University of Science and Technology, 232001 Huainan, Anhui, China.
authors.forename: Yi-Heng
authors.initials: YH
authors.lastname: Lu
authors.forename: Yu-Wei
authors.initials: YW
authors.lastname: Lu
authors.forename: Cheng-Li
authors.initials: CL
authors.lastname: Wu
authors.forename: Qun
authors.initials: Q
authors.lastname: Shao
authors.forename: Xiao-Ling
authors.initials: XL
authors.lastname: Chen
authors.forename: Rosa Ngo Biboum
authors.initials: RN
authors.lastname: Bimbong
mesh_terms: D001547:Benzaldehydes / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D006835:Hydrazones / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D001547:Benzaldehydes; D006835:Hydrazones; D009942:Organometallic Compounds; C073458:salicylaldehyde benzoyl hydrazone; D003035:Cobalt