Industrial & Engineering Chemistry Research, Vol.41, No.19, 4906-4910, 2002
A new more sulfur-resistant rhodium complex as an alternative to the traditional Wilkinson's catalyst
A new rhodium complex was obtained using tridecylamine as the ligand. The procedure was carried out with relatively simple equipment and under mild conditions of pressure and temperature. The complex so obtained showed similar activity and higher sulfur resistance than the Wilkinson's complex in heterogeneous conditions for the hydrogenation of cyclohexene to cyclohexane at low values of pressure and temperature. Fourier transform infrared (FTIR) results indicated that the tridecylamine molecule is present in the coordination sphere of the rhodium complex. Elemental microanalysis and X ray photoelectron spectroscopy (XPS) results suggested that the complex formula is [RhCl(NH2(CH2)(12)CH3)(3)], XPS also suggested that the complex suffered an insertion of a sulfur atom into the rhodium coordination sphere after poisoning with tetrahydrothiophene.