| 摘要 |
An improved olefin metathesis catalyst system is disclosed. The catalyst system comprises a transition metal halide metathesis catalyst and an organo transition metal hydride co-catalyst of the formula R'x - Cu - H. The copper hydride co-catalyst of this invention has the general formula R'x - Cu - H wherein R' is a complexing ligand preferably an organically substituted phosphine, and x is 1 or 2. The organic substituents on the phosphine group are optionally substituted C1-20 hydrocarbons, such as C1-20 alkyls or alkenyls, C3-20 cycloalkyls or cycloalkenyls having 3 to 8 carbon atoms in the ring, or optionally substituted C6-20 aryl or fused aryl. The optional substituents on the hydrocarbons include halogens, preferably chloride and fluoride; C1-6 alkyl; C1-6 alkenyl; or C1-6 alkoxy. The co-catalysts of this invention are combined with molybdenum, tungsten, or tantalum metathesis catalysts to provide an active catalytic system for the polymerization of cycloolefins, particularly dicyclopentadiene. |
