| http://www.w3.org/ns/prov#value | - Q is a halogen or a hydrocarbon radical, such as an alkyl, aryl, alkenyl, alkylaryl, or arylalkyl, having 1-20 carbon atoms and p is 2. [0015] The various metallocene structures as described above can be used either as so-called ???neutral metallocenes??? in which case an alumoxane, such as methylalumoxane, is used as a co-catalyst, or they can be employed as so-called ???cationic metallocenes???
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