| http://www.w3.org/ns/prov#value | - rmula MXn in which M is titanium, aluminum, boron, or tin, X is a halogen, and n is a positive whole number; an electron donor component having an electron donor number from at least about twenty-five to no more than about fifty; a hydrocarbon monomer component; and a solvent for said components, wherein said components are combined in amounts such that the number of moles of the Lewis acid compon
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