Conclusions
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1.
The complexes AcBr·AlBr3 and AcBr·2AlBr3 initiate cationic polymerization of isobutylene in hydrocarbon medium at −78°C and the complex AcBr·2AlBr3 is more active.
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2.
Initiation of polymerization under the effect of the AcBr·2AlBr3 complex in hexane at −78°C takes place exclusively with Ac+ and the initiating capacity of the AcBr·AlBr3 complex is due to generation of a proton in the reaction of this complex with the monomer.
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3.
Under the effect of AcBr·AlBr3 and AcBr·2AlBr3 complexes, chain breaking takes place with the formation of the same C-Br and C=C terminal groups with similar ratios equal to ∼2∶1.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2232–2238, October, 1988.
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Nesmelov, A.I., Orlinkov, A.V., Murachev, V.B. et al. Cationic polymerization of hydrocarbon monomers under the effect of complexes of acyl halides with Lewis acids. Russ Chem Bull 37, 2006–2011 (1988). https://doi.org/10.1007/BF00953394
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DOI: https://doi.org/10.1007/BF00953394