title: Catalytic reactivity of a zirconium(IV) redox-active ligand complex with 1,2-diphenylhydrazine.
abstract: Two-electron reactivity of [N2O2red]ZrL3 (1a, N2O2(red) = N,N'-bis(3,5-di-tert-butyl-2-phenoxy)-1,2-phenylenediamide, L = THF) was explored with halogens and 1,2-diphenylhydrazine. Despite a formal d0 zirconium(IV) metal center, halogen oxidative addition occurred to form [N2O2(ox)]ZrCl2(THF) (2) with two-electron oxidation of the ligand. This ligand redox activity allows catalytic reactivity with 1,2-diphenylhydrazine resulting in disproportionation to form aniline and azobenzene via a putative zirconium-imide intermediate.
authors.affiliation: Department of Chemistry, University of California, Irvine, California 92697, USA.
authors.forename: Karen J
authors.initials: KJ
authors.lastname: Blackmore
authors.forename: Neetu
authors.initials: N
authors.lastname: Lal
authors.forename: Joseph W
authors.initials: JW
authors.lastname: Ziller
authors.forename: Alan F
authors.initials: AF
authors.lastname: Heyduk