15242-79-2Relevant academic research and scientific papers
Spectroscopic characterization of some copper(II) complexes
Rani, Rekha,Ranjan, Rajeeva,Bhattacharjee,Sharma,Suraiya, Afshan
, p. 331 - 336 (2013/06/04)
1-(Phenylazo)-2-naphthol (PANH) has three potential donor sites and thus it acts as a very good chelating agent. This ligand has been used for complexation with CuII ions to synthesize the complexes of general formula Cu(PAN)2Ln, where L = secondary ligands like pyridine, picoline, H2O and n = 0, 1 and 2. These complexes have been characterized by their elemenetal analysis, conductivity measurement, magnetic moment at room temperature, infrared spectra and electronic spectra. The ligand PANH is found to have coordinated through deprotonated phenolic oxygen and azonitrogen forming a six membered chelate with two conjugate π-bonds in chelate ring. The magnetic moment values reveal the mononuclear nature of complexes while their electronic spectra reveal the geometry of the complexes. Cu(PAN)2 complex is found square planar while Cu(PAN)2L and Cu(PAN) 2L2 are found square pyramidal and tetragonally distorted octachedral respectively.
COPPER(II) IN ORGANIC SYNTHESIS. III. REACTION OF COPPER(II) COMPLEXES OF o-QUINONE MONOPHENYLHYDRAZONES WITH DIMETHYL ACETYLENEDICARBOXYLATE
Bisiacchi, Piero,Coda, Andreina Corsico,Desimoni, Giovanni,Righetti, Pier Paolo,Tacconi, Gianfranco
, p. 119 - 124 (2007/10/02)
Bis-copper(II) complexes of o-quinone monophenylhydrazones (2a-e) react with dimethyl acetylenedicarboxylate.Probably through a Michael reaction followed by intramolecular cyclization, o-benzoquinone derivatives 2a,b give indazoles 5a,b, also synthesized by a new route from isatines.Naphtho- and phenanthroquinone derivatives 2c-e are oxidized by copper(II) ions to ketocarbenes which undergo 1,3-dipolar cycloaddition to benzofuran derivatives 11c-e.
