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Synthesis and properties of alternating copolymers of carbon monoxide with 5-vinyl-2-norbornene |
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| Authors: | E. V. Novikova G. P. Belov W. H. Sun V. R. Flid |
| Affiliation: | (1) Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432, Russia;(2) Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, 100080 Beijing, China;(3) Lomonosov State Academy of Fine Chemical Technology, pr. Vernadskogo 86, Moscow, 119571, Russia |
| Abstract: | The alternating cooligomers of carbon monoxide and 5-vinyl-2-norbornene have been first synthesized in the presence of catalysts based on palladium complexes containing N^N and P^P ligands. It has been shown that the insertion of carbon monoxide proceeds for the most part via a C(2)-C(3) bond of the norbornene ring. The degree of involvement of both olefinic bonds of diene in alternating copolymerization is decreased when the reaction is carried out in a protic solvent (methanol). The structure of terminal groups of the copolymers depends on the nature of a bidentate ligand and acid. |
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