abstract |
A method for olefin metathesis polymerization, comprisingncontacting an olefin with a compound of the formulan nwherein:n the olefin is dicyclopentadiene; M is Os or Ru; R and R 1 are independently selected from hydrogen or a hydrocarbon selectednfrom the group consisting of C 2 -C 20 alkenyl, C 2 -C 20 alkynyl, C 1 -C 20 alkyl, aryl, C 1 -C 20 ncarboxylate, C 2 -C 20 alkoxy, C 2 -C 20 alkenyloxy, C 2 -C 20 alkynyloxy, aryloxy, C 2 -C 20 nalkoxycarbonyl, C 1 -C 20 alkylthio, C 1 -C 20 alkylsulfonyl, and C 1 -C 20 alkylsulfinyl; X and X 1 are independently selected from any anionic ligand; and L is any neutral electron donor; and L 1 is a trialkylphosphine ligand where at least one of the alkyl groups is ansecondary alkyl or a cycloalkyl. |