| 主权项 |
1. A process for providing a polymer, said process comprising contacting at least one polyene compound with a catalyst composition that comprises a complex of the general formulawhere
M represents a Group 3 metal atom; L represents a neutral Lewis base; z is an integer of from 0 to 3 inclusive; y is 1 or 2; R1, R2 and R3 independently are H; a halogen atom; a silyl group; a siloxy group; nitro group; sulfonate group; alkoxy group; a C1-C20 alkyl group; aralkyl group; or an aryl group, optionally including one or more C1-C8 alkyl, perfluoroalkyl, alkoxy, nitro, sulfonate or halo substituents, with the proviso that R1 and R2 or R2 and R3 can join so as to provide a substituted or unsubstituted hydrocarbylene group which forms an aromatic or non-aromatic carbocyclic ring fused with the pyrrole moiety; R4 is H, a C1-C10 alkyl group, or a substituted or unsubstituted aryl group, with the proviso that R4 can join with R3 so as to provide a substituted or unsubstituted hydrocarbylene group which forms a non-aromatic carbocyclic ring; R5 is a C1-C12 alkyl group, a C5-C8 cycloalkyl group, or an aryl group, optionally substituted at, relative to the point of connection to the N atom, the para position with a nitro group, a trifluoromethyl group, a halogen atom, an alkoxy group, a C1-C4 alkyl group, or an aryl group, or one or both ortho positions with a C1-C4 alkyl group or an aryl group; and R6 is a monoanionic ligand,thereby providing said polymer. |
