title: Metal-pyrazolyl diazine interaction: synthesis, structure and electrochemistry of binuclear transition metal(II) complexes derived from an 'end-off' compartmental Schiff base ligand.
abstract: Pyrazolyl diazine (mu-NN) bridged late first row transition metal(II) complexes have been prepared by the interaction of metal(II) chlorides with an 'end-off' compartmental Schiff base ligand. The ligand system has a strong diazine bridging component and obtained as a condensation product between 1H-pyrazole-3,5-dicarbohydrazide and 3-acetylcoumarin in absolute ethanol. All synthesized compounds are characterized on the basis of various spectral and analytical techniques. Complexes are found to be non-electrolytes and monomeric in nature. The magnetic exchange interactions are very weak because of the more electronegative exogenous chloride, though diazine bridging group bring metal centers in a close proximity.
authors.affiliation: Department of Studies in Chemistry, Karnatak University, Pavatenagar, Dharwad-580003, Karnataka India.
authors.forename: Srinivasa
authors.initials: S
authors.lastname: Budagumpi
authors.forename: Vidyanand K
authors.initials: VK
authors.lastname: Revankar
mesh_terms: D004553:Electric Conductivity; D004563:Electrochemistry; D004578:Electron Spin Resonance Spectroscopy; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008280:Magnetics; D013058:Mass Spectrometry; D008670:Metals / Q000737:chemistry*; D011719:Pyrazines / Q000138:chemical synthesis* / Q000737:chemistry; D011720:Pyrazoles / Q000138:chemical synthesis* / Q000737:chemistry; D012545:Schiff Bases / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature; D028561:Transition Elements / Q000737:chemistry*
chemical_list: D008024:Ligands; D008670:Metals; D011719:Pyrazines; D011720:Pyrazoles; D012545:Schiff Bases; D028561:Transition Elements