Artículos de revistas
The Electrochemical Oxidation Of(benzylideneacetone) Dicarbonyl(phosphine)iron(0) And (benzylideneacetone)dicarbonyl(phosphite)iron(0) Complexes In Dimethyl Formamide
Registro en:
Journal Of Electroanalytical Chemistry. , v. 297, n. 2, p. 461 - 468, 1991.
220728
10.1016/0022-0728(91)80041-N
2-s2.0-0000776787
Autor
Nogueira V.M.
Benedetti A.V.
Vichi E.J.S.
Stein E.
Institución
Resumen
The electrochemical oxidation of (benzylideneacetone)dicarbonyl(phosphine)iron(0) and (benzyl-ideneacetone)dicarbonyl(phosphite)iron(0) complexes was studied by cyclic voltammetry and controlled potential electrolysis in 0.5 M NaClO4 (dimethyl formamide). The results suggest that the electrode process involves a complicated mechanism, the species formed in the first oxidation step being highly unstable and its decomposition producing free benzylideneacetone, free phosphine or phosphite, solvated iron(II) species and carbon monoxide which adsorbs on the platinum electrode. A linear relationship between Eox p/2 and the ligand parameter PL was obtained with Es = 0.41 V and β = 0.964, where Es and β denote electron-richness and polanzability of the metal centre, respectively. © 1991. 297 2 461 468 Howell, Johnson, Jostly, Lewis, (1972) J. Organomet. Chem., 39, p. 329 Graham, Scholes, Browkhart, (1977) J. Am. Chem. Soc., 99, p. 1180 El Murr, Reveccie, Dixneuf, Electrochemical reduction of a heterodienetricarbonyliron(0) complex as a route to novel tricarbonyliron anions (1978) Journal of the Chemical Society, Chemical Communications, p. 552 Benedetti, Nogueira, Vichi, (1984) IV SIMP. BRAS. Eletroq. e Eletroanal., p. 741. , São Carlos, S.P., Brazil Benedetti, Nogueira, Fugivara, Magnani, (1986) V SIMP. BRAS. Eletroq. e Eletroanal., p. 737. , São Paulo, S.P., Brazil Benedetti, Nogueira, Vichi, Stein, (1986) Quím. Nova, 9, p. 219 Chifford, Mukherjee, (1966) Inorg. Synth., 8, p. 179 Johnson, Lewis, Stephenson, Vichi, Preparation and reactions of triphenylphosphine and triphenyl phosphite complexes of (benzylideneacetone)dicarbonyliron(0) (1978) Journal of the Chemical Society, Dalton Transactions, p. 369 Vichi, Raithby, McPartlin, (1983) J. Organomet. Chem., 256, p. 111 Brummer, (1965) J. Chem. Phys., 42, p. 1636 Hills, Reference Electrodes (1961) Theory and Practice, pp. 198-199. , D.J. Ives, C.J. Janz, Academic Press, New York Benedetti, Fugivara, Rabockai, Reference Electrodes in Dimethylformamide (1983) Analytical Letters, 16, p. 1357 E.J.S. Vichi, E. Stein and E.B. Saitovich, unpublished resultsLeiva, Giordano, (1983) J. Electroanal. Chem., 158, p. 115 Blanch, Bond, Colton, (1981) Inorg. Chem., 20, p. 755 Chatt, Kan, Leigh, Picket, Stanley, Transition-metal binding sites and ligand parameters (1980) Journal of the Chemical Society, Dalton Transactions, p. 2032 Chatt, (1982) Coord. Chem. Rev., 43, p. 337 Pombeiro, (1985) Inorg. Chim. Acta, 103, p. 95 Pombeiro, (1985) Port. Electrochim. Acta, 3, p. 41