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Issue 8, 2015
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Double cyclizative polymerization of trienes catalyzed by Pd complexes. Combined ring-forming and chain-walking reactions of the growing end

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Abstract

Pd complex with a diimine ligand catalyzes polymerization of 1,6,13-heptadecatrienes having functionalized substituents at 4 and 11 positions to produce the polymers containing two functionalized trans-1,2-cyclopentylene groups in every repeating unit. The two neighboring five-membered rings of the polymer are separated by ethylene and pentamethylene spacers alternatingly, suggesting that the chain-walking of the growing polymer end occurs smoothly until formation of the five-membered ring or insertion of a vinyl group of the new monomer into the terminal Pd–CH2 bond. The 1,6,13-heptadecatrienes having the cyclic acetal group at the 4-position and the cyclic acetal, cyclic ester, acyclic ester, or sulfonamide groups at the 11 position undergo smooth polymerization to produce the polymers with Mn > 10 000. The monomer with ester groups at 4-position gives polymers in low yields.

Graphical abstract: Double cyclizative polymerization of trienes catalyzed by Pd complexes. Combined ring-forming and chain-walking reactions of the growing end

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Publication details

The article was received on 13 Nov 2014, accepted on 12 Dec 2014 and first published on 15 Dec 2014


Article type: Paper
DOI: 10.1039/C4PY01555J
Polym. Chem., 2015,6, 1248-1254

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    Double cyclizative polymerization of trienes catalyzed by Pd complexes. Combined ring-forming and chain-walking reactions of the growing end

    K. Motokuni, D. Takeuchi and K. Osakada, Polym. Chem., 2015, 6, 1248
    DOI: 10.1039/C4PY01555J

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