Conclusions
By studying the liquid-phase dimerization of ethylene in the presence of Cat-Et3Al2-Cl3 catalytic systems based on a nickel complex heterogenized on Al2O3 and a number of model nickel complexes, a similar activity and selectivity of the process has been established (Cat=NiPPh3(CO)2L, where L=PPh3, CO, Al2O3; Ni(PPh3)2(CO)2; Ni(PPh3)2(η2-C2H4); Ni[P(C6H11)3]2(H)Cl and Ni(PPh3)(Et)Cl).
The results of the investigation agree with the hypothesis that mono- and diolefinic nickel complexes are formed as the active intermediates in the reaction.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2466–2469, November, 1988.
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Furman, D.B., Volchkov, N.V., Isaeva, L.S. et al. Metal complexes in the catalytic reactions of olefins. 1. Comparison of the catalytic properties of triphenylphosphine nickel complexes both individually and heterogenized on Al2O3 in the dimerization of ethylene. Russ Chem Bull 37, 2220–2222 (1988). https://doi.org/10.1007/BF00959864
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DOI: https://doi.org/10.1007/BF00959864