1. ChemInform Abstract: Olefin Isomerization Catalysts Based on Dithio Palladium(II) Complexes
- Author
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Kingsley J. Cavell, E. J. Peacock, K. Y. Chan, M. J. Ridd, and Noel W. Davies
- Subjects
Olefin fiber ,Thermodynamic equilibrium ,Chemistry ,Organic chemistry ,Kovats retention index ,chemistry.chemical_element ,Halide ,General Medicine ,Medicinal chemistry ,Isomerization ,Catalysis ,Palladium - Abstract
The catalytic double-bond shift isomerization of α-olefins by dithio-β-diketonate palladium complexes Pd{CH3C(S)CHC(S)CH3}(PL1L2L3)X(1) and [Pd{CH3C(S)CHC(S)CH3}{Ph2PCH2CH2PPh2}]Y(2)(X = 1, Br; Y = halide, PF6, BPh4) is described. Catalysts are formed on activation of the complexes by a variety of alkylaluminium cocatalysts . Several of the catalysts are highly active for isomerization of oct-1-ene and but-1-ene, activities being higher than normally obtained for palladium systems. In contrast to the majority of palladium-based catalysts product distributions rapidly approached thermodynamic equilibrium, with a strong preference for trans products at each stage of the reaction. Products from the isomerization of oct-1-ene were analysed by g.l.c.-F.t.i.r . in conjunction with Kovats retention indices.
- Published
- 2010