title: Photoacoustic spectra of some biological metal chelates.
abstract: Photoacoustic spectra of Ni2+ in three new chelates containing azolo-2,4 pentanedione derivatives have been recorded and analysed in the visible region. The approximate symmetry of Ni2+ has been found to be octahedral. The d-d transitions in the red region show some similarity with those of nickel chloride and nickel acetate. In each case two charge-transfer bands appear in the violet region.
authors.affiliation: Department of Physics, Banaras Hindu University, Varanasi, India.
authors.forename: R L
authors.initials: RL
authors.lastname: Prasad
authors.forename: S N
authors.initials: SN
authors.lastname: Thakur
mesh_terms: D000085:Acetates / Q000032:analysis / Q000737:chemistry*; D000162:Acoustics; D002614:Chelating Agents / Q000737:chemistry*; D008024:Ligands; D009532:Nickel / Q000032:analysis / Q000737:chemistry* / Q000494:pharmacology*; D009942:Organometallic Compounds / Q000032:analysis / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D000085:Acetates; D002614:Chelating Agents; D008024:Ligands; D009942:Organometallic Compounds; C022838:nickel chloride; D009532:Nickel; C119536:nickel acetate