6640-91-1Relevant academic research and scientific papers
New Antiferromagnetic Copper(II) Complexes with ONO Donor Schiff Bases
Havinale, B. R.,Pujar, I. B.
, p. 1042 - 1045 (2007/10/02)
Copper(II) complexes of schiff bases derived from salicylaldehyde, 5-methylsalicylaldehyde, 5-chlorosalicylaldehyde, 3-methoxysalicylaldehyde, o-hydroxyacetophenone, 2-hydroxy-1-naphthaldehyde and 1-aminomethyl-2-naphthol have been synthesized.The elemental analyses indicate 1:1 stoichiometry.The complexes exhibit subnormal magnetic moments (1.46-1.39 B.M.) at room temperature due to antiferromagnetic exchange.The complexes exhibit one broad and two sharp intense electronic spectral bands in the ranges 600-630, 390-410 and 320 nm respectively.The ESR spectra of the complexes at room temperature resemble those of standard dimers.The schiff bases behave as tridentate dibasic ONO donor ligands giving the complexes of the type CuL where L is the dianion of the schiff base.On the basis of magnetic susceptibility, infrared, electronic spectra and ESR spectra, a dimeric structure with 1-aminomethyl-2-naphtholic oxygen atoms as the bridging atoms is suggested.
Manganese(II and III) Complexes of Schiff Bases Containing ONO Donors
Havinale, B. R.,Pujar, I. B.
, p. 1130 - 1132 (2007/10/02)
Manganese(II and III) complexes of schiff bases derived from 2-hydroxy-1-naphthylmethylamine and salicylaldehyde and its derivatives have been synthesized and characterised on the basis of magnetic and spectral data.The elemental analyses show 1:1 (metal-ligand) stoichiometry indicating the dibasic behaviour of the ligands.The infrared spectral study reveals the tridentate nature (ONO) of the ligands.The complexes exhibit magnetic moments below the spin-only value attributable to the dimeric nature of the complexes.On the basis of magnetic and spectral data, dimeric octahedral and square-pyramidal structures for manganese(II) and manganese(III) complexes respectively with naphthylmethylaminophenolic oxygen atoms as the bridging atoms are suggested.
