title: Borane-mediated silylation of a metal-oxo ligand.
abstract: The addition of 1 equiv of HSiPh(3) to UO(2)((Ar)acnac)(2) ((Ar)acnac = ArNC(Ph)CHC(Ph)O; Ar = 3,5-(t)Bu(2)C(6)H(3)), in the presence of 1 equiv of B(C(6)F(5))(3), results in the formation of U(OSiPh(3))(OB{C(6)F(5)}(3))((Ar)acnac)(2) (1), via silylation of an oxo ligand and reduction of the uranium center. The addition of 1 equiv of Cp(2)Co to 1 results in a reduction to uranium(IV) and the formation of [Cp(2)Co][U(OSiPh(3))(OB{C(6)F(5)}(3))((Ar)acnac)(2)] (2) in 78% yield. Complexes 1 and 2 have been characterized by X-ray crystallography, while the solution-phase redox properties of 1 have been measured with cyclic voltammetry.
authors.affiliation: Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, California 93106, USA.
authors.forename: David D
authors.initials: DD
authors.lastname: Schnaars
authors.forename: Guang
authors.initials: G
authors.lastname: Wu
authors.forename: Trevor W
authors.initials: TW
authors.lastname: Hayton