Experimental study demonstrates efficient olefin dimerization using novel nickel(II) precursor complexes, indicating ligand backbone modifications directly govern catalytic reactivity.
Nickel(II)−aminoacrylate, −aminoiminoacrylate, and −amidoiminomalonate complexes 1 − 4 are suitable precursors together with appropriate cocatalysts for the catalytic dimerization of ethylene, propylene, and α-olefins with short chain lengths such as 1-hexene. Suitable ligands IV − VI, VIII, X, and XII generate nickel(II) compounds 1 − 4 active for these catalytic dimerizations. The influence of different substituents attached to the coordinating ligand backbone is tested in the catalytic reactions. Several novel monodentate and chelate nickel(II) precursor complexes 1 and 3 were isolated and also characterized by X-ray structure analysis.
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Bluhm et al. (2005) studied this question.
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