%0 Journal Article %A Kobayashi, Shingo %A Pitet, Louis M. %A Hillmyer, Marc A. %D 2011 %T Regio- and Stereoselective Ring-Opening Metathesis Polymerization of 3-Substituted Cyclooctenes %U https://acs.figshare.com/articles/journal_contribution/Regio_and_Stereoselective_Ring_Opening_Metathesis_Polymerization_of_3_Substituted_Cyclooctenes/2661508 %R 10.1021/ja201644v.s001 %2 https://ndownloader.figshare.com/files/4321954 %K polymer %K backbone carbon %K hydrogenated %K metathesi %K Polymerization %K regioregularity %K polymerized %K precision LLDPEs %K ROMP %K R substituents %K polymerization %K sample %K Substituted %K density polyethylene %K polyoctenamer %K Grubb %K methyl %K Cyclooctene %K Hydrogenation %K R substituent %K phenyl %K stereoselective manner %K Regio %K 3 RCOEs %K catalyst %K selectivity increases %K Stereoselective %K Metathesi %K regio %K hexyl %K model %X 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. %I ACS Publications