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Functionalization of spherosilicates via hydrosilylation catalyzed by well-defined rhodium siloxide complexes immobilized on silica

Authors
Journal
Journal of Molecular Catalysis A Chemical
1381-1169
Publisher
Elsevier
Volume
391
Identifiers
DOI: 10.1016/j.molcata.2014.04.014
Keywords
  • Rhodium Siloxide Complexes
  • Silica Supports
  • Immobilized Complexes
  • Hydrosilylation
  • Functionalized Spherosilicates

Abstract

Abstract Well-defined rhodium siloxide complexes immobilized on silica ([(SiO)(SiOX)Rh(cod)](Aerosil 200) 1 and [(SiO)Rh(cod)(PCy3)](Aerosil 200) 2) synthesized via direct condensation of respective molecular precursors appeared to be very effective catalysts for quantitative synthesis of functionalized spherosilicates via direct hydrosilylation of olefins with octahydridospherosilicate. Catalyst 1 was also very active in subsequent hydrosilylation of two different olefins, which permitted efficient syntheses of spherosilicates with mixed functional groups of desired stoichiometric ratios. The catalysts were recycled at least 10 times without loss of efficiency in all the hydrosilylation processes performed.

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