Copolymerization of Hepta-1,6-diene with Ethylene Catalyzed by Cobalt Complexes

✍ Scribed by Daisuke Takeuchi; Ryuichi Matsuura; Kohtaro Osakada

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 192 KB
• Volume: 29
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200800424

✦ Synopsis

Abstract

Copolymerization of hepta‐1,6‐diene with ethylene using a cobalt–bis(imino)pyridine complex affords a polymer that contains trans‐1,2‐five‐membered rings in the repeating unit from hepta‐1,6‐diene. The ratio of the repeating units of diene to those of ethylene is controlled from 3: 97 to 50:50, depending on the reaction conditions. Isotope‐labeling reactions reveal that the major chain transfer pathway involves β‐hydrogen elimination of the polymer end formed after ethylene insertion.

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