Title

Facile Formation of Homoleptic Au(III) Trications via Simultaneous Oxidation and Ligand Delivery from [PhI(pyridine)2]2+

Document Type

Article

Publication Date

9-2014

Publication Details

This article was originally published as:

Corbo, R., Pell, T. P., Stringer, B. D., Hogan, C. F., Wilson, D. J., Barnard, P. J., & Dutton, J. L. (2014). Facile formation of homoleptic Au(III) trications via simultaneous oxidation and ligand delivery from [PhI(pyridine)2]2+. Journal of the American Chemical Society, 136(35), 12415-12421. doi:10.1021/ja506365m

ISSN:1520-5126

Abstract

We report the first examples of Au(III) tricationic complexes bound only by neutral monodentate ligands, which are a new class of gold reagents. Oxidative addition to the bis-pyridine Au(I) cation, [Au(4-DMAP)2]+, using a series of dicationic I(III) oxidants of the general form [PhI(L)2]2+ (L = pyridine, 4-DMAP, 4-cyanopyridine) allows ready access to homoleptic and pseudo-homoleptic Au(III) complexes [Au(4-DMAP)2(L)2]3+. The facile oxidative addition of Au(I) species additionally demonstrates the efficacy of PhI(L)2]2+ reagents as halide-free oxidants for Au(I). Comparisons are made via attempts to oxidize NHC-Au(I)Cl, where introduction of the chloride anion results in complex mixtures via ligand and chloride exchange, demonstrating the advantage of using the pyridine-based homoleptic compounds. The new Au(III) trications show intriguing reactivity with water, yielding dinuclear oxo-bridged and rare terminal Au(III)−OH complexes.

Comments

Due to copyright restrictions this article is unavailable for download.

This article may be accessed from the publisher here.

At the time of writing David Wilson was affiliated with Avondale College as a Conjoint Lecturer.