prov:value
| - c) the organoaluminum compound being represented by General Formula (3): ##STR2## where R6, R6' and R6 are independently a hydrogen atom, a halogen atom, an amino group, an alkyl group, an alkoxy group, or an aryl group, and at least one of R6, R6', and R6 is an alkyl group; the preferred amount of Lewis base compound is 0.1 to 1,000 moles per mole of the metallocene compound.
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