01538naa a2200193 a 450000100080000000500110000800800410001910000220006024501740008226000090025652008650026565300340113065300210116465300220118565300270120770000190123470000220125377300690127514883402018-05-23       2006    bl uuuu     u00u1 u    #d1 aRIBEIRO, P. E. A.  aCationic rhodium (I) complexes containing 4,4,'-disubstituted 2,2,'-bipyridinesba systematic variation on electron density over the metal centre.h[electronic resource]  c2006  aA series of [Rh(COD)(X2-bipy)]BF4 complexes (COD = 1,5-cyclooctadiene; X2-bipy = 4,4'-disubstituted 2,2'-bipyridines; X = OCH3, CH3, H, Cl or NO2) has been prepared from [Rh(COD)Cl]2. The complexes for X = OCH3, Cl and NO2 have not been described previously in the literature. All complexes have been characterised by elemental analysis, IR, 1H NMR and UV?Vis spectrometry. This series of complexes presents a wide variation on electron density over the metal centre with virtually no variation on its steric environment which discloses interesting possibilities for catalytic and electro-catalytic studies. A preliminary evaluation of these complexes on the hydroformylation of camphene and ß-pinene showed that under the rather drastic conditions employed the complexes acted as a precursor for [Rh(CO)3H], which accounts for most of the catalytic activity.  aCationic rhodium(I) complexes  aHydroformylation  aRhodium catalysts  aSubstituted bipyridine1 aDONNICI, C. L.1 aSANTOS, E. N. dos  tJournal of Organometallic Chemistrygv. 691, p. 2037-2043, 2006.