title: Spectral and thermal characterization of 3-acetyl-5-azophenyl-4-hydroxy-6-methyl-pyran-2-one and its metal complexes.
abstract: Five chelates of 3-acetyl-5-azophenyl-4-hydroxy-6-methyl-pyran-2-one (phenylazo dehydroacetic acid) with Cr(III), Fe(III), Ni(II), Cu(II) and Zn(II) have been synthesized and characterized by elemental analysis, magnetic susceptibility measurements, electronic, (1)H NMR, FAB mass, IR-spectral and thermal (TG/DTG) analytical techniques. In the present work it has been found that oxygen of the deprotonated OH group and one of the azo-nitrogens of the ligand take part in coordination. The Cr(III), Fe(III) and Ni(II) complexes were found to be having octahedral geometry and the Cu(II) and Zn(II) tetrahedral.
authors.affiliation: P.G. and Research Department of Chemistry, Malabar Christian College, Kozhikode 673 001, Kerala, India. susannahseth@yahoo.co.in
authors.forename: Susannah
authors.initials: S
authors.lastname: Seth
authors.forename: K K
authors.initials: KK
authors.lastname: Aravindakshan
mesh_terms: D000107:Acetylation; D001391:Azo Compounds / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D011714:Pyrans / Q000737:chemistry*; D011753:Pyrones / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013818:Thermogravimetry
chemical_list: D001391:Azo Compounds; D056831:Coordination Complexes; D011714:Pyrans; D011753:Pyrones; C027493:dehydroacetic acid