http://www.w3.org/ns/prov#value | - Also combinations of a-diimines or other diimino ligands described herein with: a nickel O! or nickel I! compound, oxygen, an alkyl aluminum compound and an olefin; a nickel O! or nickel I! compound, an acid such as HX and an olefin; or an ??-diimine Ni O! or nickel I! complex, oxygen, an alkyl aluminum compound and an olefin.
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