title: Tuning Nickel with Lewis Acidic Group 13 Metalloligands for Catalytic Olefin Hydrogenation.
abstract: A series of bimetallic complexes pairing zero-valent nickel with group 13 M(III) ions is reported. Stronger Ni→M(III) dative bonds that render Ni more electron-deficient are seen for larger ions (In > Ga > Al). The larger Ga and In ions stabilize rare, nonclassical Ni-H2 adducts that catalyze olefin hydrogenation. In contrast, neither the Ni-Al complex nor a single nickel center enables H2 binding or olefin hydrogenation. By comparison of the structures, redox properties, and catalytic activities of the Ni-M series, the electronic and steric effects of the supporting metal ion are elucidated.
authors.affiliation: Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States.
authors.forename: Ryan C
authors.initials: RC
authors.lastname: Cammarota
authors.affiliation: Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States.
authors.forename: Connie C
authors.initials: CC
authors.lastname: Lu
mesh_terms: D001555:Benzene Derivatives / Q000737:chemistry; D002384:Catalysis; D006865:Hydrogenation; D058116:Lewis Acids / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D009532:Nickel / Q000737:chemistry*; D020058:Styrene / Q000737:chemistry
chemical_list: D001555:Benzene Derivatives; D058116:Lewis Acids; D008024:Ligands; D020058:Styrene; D009532:Nickel; C004912:ethylbenzene