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Boletín de la Sociedad Chilena de Química

versión impresa ISSN 0366-1644

Resumen

MAYORA, J. et al. INFLUENCE OF THE REACTION CONDITIONS ON THE REDUCTION OF NITROBENZENE CATALIZED BY POLY (4-VINYLPYRIDINE) ANCHORED [RH(COD)(2-PIC)2](PF6) COMPLEX. Bol. Soc. Chil. Quím. [online]. 2001, vol.46, n.2, pp.121-129. ISSN 0366-1644.  http://dx.doi.org/10.4067/S0366-16442001000200004.

Reported here are the influence of the reaction conditions variation (carbon monoxide pressure, P(CO), rhodium content, [Rh], and temperature) on the catalytic reduction of nitrobenzene to aniline by [Rh(COD)(2-pic)2](PF6) (COD = 1,5-cyclooctadiene, 2-pic = 2-picoline) immobilized on poly(4-vinylpyridine) in contact with 80 % aqueous 2-ethoxyethanol under water-gas shift reactions conditions (RDGA, CO + H2O ¤ CO2 + H2). The turnover frequencies for the production of aniline displayed a first order dependence on the pressure of CO in the 0 - 1.9 atm range, a nonlinear dependence on rhodium content on the 0.9 - 12.2 wt. % range indicating that the active species have different nuclearities. The temperature dependence followed a segmented Arrhenius plot in the 70 ­ 130 °C ranges. These data are discussed in terms of a possible mechanism

Palabras clave : Nitrobenzene reduction; WGSR; rhodium catalyst.

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