Synthesis of cis,syndiotactic ROMP Polymers Containing Alternating Enantiomers

Ring-opening metathesis polymerization (ROMP) of rac-endo,exo-5,6-dicarbomethoxynorbornene (inter alia) yields a cis,syndio,alt-polymer, one in which the sequential units in the cis,syndiotactic polymer consist of alternating enantiomers. Cis selectivity arises through addition of the monomer to pro...

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Published inJournal of the American Chemical Society Vol. 133; no. 6; pp. 1784 - 1786
Main Authors Flook, Margaret M., Ng, Victor W. L., Schrock, Richard R.
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 16.02.2011
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Summary:Ring-opening metathesis polymerization (ROMP) of rac-endo,exo-5,6-dicarbomethoxynorbornene (inter alia) yields a cis,syndio,alt-polymer, one in which the sequential units in the cis,syndiotactic polymer consist of alternating enantiomers. Cis selectivity arises through addition of the monomer to produce an all-cis-metallacyclobutane intermediate, while syndioselectivity and alternating enantiomer structures arise as a consequence of inversion of configuration at the metal center with each metathesis step.
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ISSN:0002-7863
1520-5126
DOI:10.1021/ja110949f