Abstract
Palladium(II)-SCS-pincer complexes have been covalently immobilized on porous silica and polynorbornene supports and evaluated in the Mizoroki-Heck reaction of iodobenzene and n-butyl acrylate. Kinetic experiments and poisoning studies indicate that the pincer complexes decompose under reaction conditions via rupture of the palladium-ligand bonds to liberate active Pd(0) homogeneous species. There is no evidence for catalysis by the intact Pd(II) pincer complex under any conditions evaluated, ruling out a Pd(II)-Pd(IV) catalytic mechanism that has been postulated for palladacycle catalysts under the conditions used here.
Original language | English (US) |
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Pages (from-to) | 101-110 |
Number of pages | 10 |
Journal | Journal of Catalysis |
Volume | 226 |
Issue number | 1 |
DOIs | |
State | Published - Aug 15 2004 |
Keywords
- Catalyst
- Heck
- Leaching
- Organometallic
- Palladium
- Pincer
- Silica
ASJC Scopus subject areas
- Catalysis
- Physical and Theoretical Chemistry