| http://www.w3.org/ns/prov#value | - 1 to C10, dialkylamino from C1 to C10, methyl, ##STR16## each R1 is independently selected from the group consisting of halogen, alkoxy from C1 to C10, and R', L is selected from the group consisting of ##STR17## Q, and X, where L can be bridged to Q, B is an optional Lewis base, n is 0 to 5, and M is selected from the group consisting of titanium, zirconium, and hafnium.
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