Entrapment of metallic palladium and a rhodium(I) complex in a silica sol-gel matrix. Formation of a highly active recyclable arene hydrogenation catalyst

摘要: A combined palladium–rhodium catalyst, generated by silica sol–gel-co-entrapment of metallic palladium and [Rh(cod) (-Cl)]2, catalyzes under ambient conditions the hydrogenation toluene other simple benzene derivatives. The catalyst is perfectly recyclable promotes at 80 ◦ C 400 psi, also polycyclic sterically hindered arenes that are capable penetrating matrix pores. synergistic effect assumed to exist between two metals, as either entrapped components a less active than combination both. © 2002 Elsevier Science B.V. All rights reserved.