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Cooperating catalysts: The combined single-site/dispersed-metal catalyst [Rh(cod)(sulphos)]–Pd0/SiO2 (cod=cyclooctadiene; sulphos=−O3S(C6H4)CH2C(CH2PPh2)3) is more efficient than the dispersed-metal catalyst Pd0/SiO2 for the hydrogenation of arenes to cycloalkanes. The grafted rhodium moieties and the palladium particles in [Rh(cod)(sulphos)]–Pd0/SiO2 cooperate to speed up the hydrogenation of arenes (see scheme).
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Bianchini et al. (2003) studied this question.
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