| http://www.w3.org/ns/prov#value | - B(Cp)(Fl)MQ2 wherein M comprises a metal, Q is a halogen, an alkyl group or an aryl group or combinations thereof, Cp is a cyclopentadienyl group substituted with a tertiary butyl group in the 3-position, Fl is a fluorenyl group, B is a bridging group that may be characterized by the general formula ???YRH wherein Y is C and R comprises an alkyl group, an aryl group, a poly-aryl group or combinati
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