| http://www.w3.org/ns/prov#value | - M is a Group 4, 5, or 6 transition metal, for example titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten, R is a hydrocarbyl group or hydrocarboxy group having from one to 20 carbon atoms, X is a halogen, and m=1-3, n=0-3, q???0-3, and the sum of m+n+q is equal to the oxidation state of the transition metal. [0047] Methods for making and using metallocene
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