title: Regio- and stereoselective ring-opening metathesis polymerization of 3-substituted cyclooctenes.
abstract: 3-Substituted cis-cyclooctenes (3RCOEs, R = methyl, ethyl, hexyl, and phenyl) were synthesized and polymerized, and the polymers therefrom were hydrogenated to prepare model linear low density polyethylene (LLDPE) samples. The ring-opening metathesis polymerization (ROMP) of the 3RCOEs using Grubbs' catalyst proceeded in a regio- and stereoselective manner to afford polyoctenamers [poly(3RCOE)] exhibiting remarkably high head-to-tail regioregularity and high trans-stereoregularity. The overall selectivity increases with the increasing size of the R substituent. Hydrogenation of poly(3RCOE)s afforded precision LLDPEs with R substituents on every eighth backbone carbon.
authors: Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States.
authors: Shingo
authors: S
authors: Kobayashi
authors: Louis M
authors: LM
authors: Pitet
authors: Marc A
authors: MA
authors: Hillmyer