Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 4, Issue 1, Pages 62-70Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cy00598d
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Funding
- Spanish Ministerio de Economia y Competividad [CONSOLIDER INGENIO CSD2006-0015, CSD2009-00050, CTQ2011-27593, CTQ2012-35665]
- Juan de la Cierva program
- Diputacion General de Aragon-Fondo Social Europeo group E07
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The new rhodium(I) complexes [Rh(Cl)(COD)(R-NHC-(CH2)(3)Si(OiPr(3))(3))] (R = 2,6-diisopropylphenyl (2a); n-butyl (2b)) have been synthesised and fully characterised. The study of their application as ketone hydrosilylation catalysts showed a clear N-substituent effect, 2a being the most active catalyst precursor. Complex 2a has been immobilised in the mesoporous materials MCM-41 and KIT-6. The new hybrid materials have been fully characterised and used as catalyst precursors for the preparation of poly(silyl ether)s by catalytic hydrosilylation. The heterogeneous catalytic systems based on the materials 2a-MCM-41 and 2a-KIT-6 afford polymers with high average molecular weight (M-w) M-w = 2.61 x 10(6) g mol(-1) (2a-MCM-41) and M-w = 4.43 x 10(5) g mol(-1) (2a-KIT-6).
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