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Some aspects of copolymerization of dienes under the influence of π-allyl complexes of nickel

✍ Scribed by B.A. Dolgoplosk; S.I. Beilin; Yu.V. Korshak; G.M. Chernenko; L.M. Vardanyan; M.P. Teterina

Publisher: Elsevier Science
Year: 1973
Tongue: English
Weight: 671 KB
Volume: 9
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(73)90053-0

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✦ Synopsis

Abstract~-Allyl complexes of nickel induce stereospecific homopolymerization of cyclohexadiene-1,3 and 2,3-dimethylbutadiene with the formation of crystalline polymers. These polymers consist of 1,4-monomer units in cis-configuration for polycyclohexadiene and in trans-configuration for poly-2,3-dimethylbutadiene. Peculiarities of copolymerization of cyclohexadiene-l,3 with butadiene and isoprene and of 2,3-dimethylbutadiene with butadiene under the influence of various 7r-allyl complexes of nickel are studied. By i.r.-and NMR-spectroscopy and radiochemical methods, the composition of copolymers for the above pairs of monomers are determined and the reactivity ratios are found. Influence of the monomers on the microstructure of the chain in copolymerization is established; the mechanism of this phenomenon is discussed.

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