| abstract |
The application describes compositions and methods for catalizying and controlling the rate of olefin metathesis reactions including Ring Opening Metathesis Polymerization (ROMP) reactions where the composition includes a Ruthenium or Osmium carbene complex having formula (I) and a gel modification additive. In the formula M may be Os or Ru; R and R1 may be the same or different and may be hydrogen or a substituent group including C¿2?-C20 alkenyl, C2-C20 alkynyl, C1-C20 alkyl, aryl, C1-C20 carboxylate, C1-C20 alkoxy, C2-C20 alkenyloxy, C2-C20 alkynyloxy, aryloxy, C2-C20 alkoxycarbonyl, C1-C20 alkylthio, C1-C20 alkylsulfonyl and C1-C20 alkylsulfinyl; X and X?1¿ may be the same or different and may be any anionic ligand; and L and L1 may be the same or different and may be neutral electron donor. The gel modification additive may be a neutral electron donor or a neutral Lewis base including phosphine, sulfonated phosphine, phosphite, phosphinite, phosphonite, arsine, stibine, ether, amine, amide, sulfoxide, carboxyl, nitrosyl, pyridine or thioether; or a trialkylphosphine or triarylphosphine. |