Characterization of peroxo and hydroperoxo intermediates in the aerobic oxidation of N-heterocyclic-carbene-coordinated palladium(0)

Michael M Konnick; Ilia A Guzei; Shannon S Stahl

doi:10.1021/ja046884u

Characterization of peroxo and hydroperoxo intermediates in the aerobic oxidation of N-heterocyclic-carbene-coordinated palladium(0)

J Am Chem Soc. 2004 Aug 25;126(33):10212-3. doi: 10.1021/ja046884u.

Authors

Michael M Konnick¹, Ilia A Guzei, Shannon S Stahl

Affiliation

¹ Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA.

PMID: 15315411
DOI: 10.1021/ja046884u

Abstract

An eta2-peroxopalladium(II) complex, derived from dioxygen addition to Pd(IMes)2 (IMes = bis-1,3-di(2,4,6-trimethylphenyl)imidazoline-2-ylidene), has been isolated and characterized. Subsequent addition of HOAc to (IMes)2Pd(O2) yields the first example of a hydroperoxopalladium species derived from molecular oxygen. The characterization and reactivity studies of these complexes provide the most detailed insights to date into the proposed mechanism for palladium(0) oxidation by molecular oxygen.