Synthesis and immobilization of N-heterocyclic carbene complexes of Ru(II):: catalytic activity and recyclability for the furan formation

Synthesis, characterization and immobilization of ruthenium(II) complexes of the type [RuCl2L(eta(6)-arene)] (L=CN(CH2PH)CH2CH2N(CH2)(3)Si(OEt)(3), arene = p-cymene, 3 and arene = C6Me6, 4) and [RuCl2L] (L = eta(1)-carbene-eta(6)-arene bidentate ligand, CN[(CH2)(3)Si(OEt)(3)]CH2CH2NCH2C6H2Me3-eta(6)), 5, morphologically different silicas by sol-gel method are described and their reactivity and recyclability in the furan formation were also reported. (C) 2002 Elsevier Science B.V. All rights reserved.