Wilkinson's catalyst catalyzes the hydrogenation of alkenes, the mechanism of which involves the initial dissociation of one or two triphenylphosphine ligands to give 14 or 12-electron complexes, respectively, followed by oxidative addition of H2 to the metal....
Figure 1. Proposed mechanism for hydrogenation of alkenes by Wilkinson’s catalyst. 2 Synthesis of RhCl(PPh 3 ) 3 , Wilkinson’s Catalyst RhCl 3 · 3H 2 O + P(C 6 H 5 ) 3 → RhCl(P(C 6 H 5 ) 3 ) 3 Place 20 mL of absolute ethanol in a 25-mL round bottom flask eq...
The reaction of Wilkinson's catalyst Rh(PPh3)3Cl (1) with 1鈥 2 equiv. of di-n-hexylsilane gives rise to a complex mixture of products, which has been analyzed by 31P{1H} NMR and shown to include the hydrido complex Rh(PPh3)3H (3). Continuous sampling of the 1:1 reaction ...
The cover picture shows the dehydrocoupling of a tertiary silane catalyzed by Wilkinson's catalyst. The hydrosilane used as substrate in this reaction has two thioether moieties, which are useful to synthesize an active species in the catalytic cycle, such as the silylhydridorhodium(III) complex...
Wilkinson catalystPyridineDensity functional calculationsElectron withdrawing substituents•The rate-determining step of the [2 + 2 + 2] cycloaddition catalyzed by the Wilkinson complex is the initial oxidative addition.•Oxidative addition between two acetylenes is more favorable than between ...
N , N , N ′, N ′, N ′′-pentamethyldiethylenetriamine was found to be very effective in removing the catalyst. HNBR particle size and the extraction temperature on catalyst removal were investigated. The mechanism involved in the separation process was elucidated. This study promotes the ...
Reaction mechanismChloro complexOrganic ligandTertiary phosphinereactions of catecholborane with wilkinson's catalyst: implications for transition metal-catalyzed hydroborations of alkenes-反应儿茶酚Wilkinson催化剂的烯烃为过渡金属催化hydroborations的影响-知来论文发表中心...
H. J. M., et al., “Kinetics and Mechanism of Cyclohexene Hydrogenation with Anchored Wilkinson Complex Comparison with the Behaviour of the Homogeneous Catalyst”, Journal of Molecular Catalysis, 1981, vol. 11, pp. 301-311.De Croon, M. H. J. M., et al., " Kinetics and Mechanism of...
The cover picture shows the dehydrocoupling of a tertiary silane catalyzed by Wilkinson's catalyst. The hydrosilane used as substrate in this reaction has two thioether moieties, which are useful to synthesize an active species in the catalytic cycle, such as the silylhydridorhodium(III) complex...
ReaktionsmechanismenRhodium(I)WilkinsonâKatalysatorThe addition of Barton's base has a dramatic effect on the classic rhodium(III)-mediated hydrogenations promoted by Wilkinson′s catalyst. Following the initial oxidative addition, a barrierless reductive elimination of HCl from the ...