title: Silver ion enhanced C-H activation in Pt(II) hydroxo complexes.
abstract: Reacting neutral Pt(ii) hydroxo compounds (NN)Pt(R)(OH) (R = OH, Ph, and Me, NN = bulky terphenyl diimine) with silver bis(trifluromethanesulfonyl)imide produces new hydroxo complexes with the silver binding through the Pt-OH bonds as determined by (195)Pt NMR and X-ray analysis (R = OH). These complexes were found to activate the aromatic C-D bonds of C6D6 at significantly enhanced rates relative to the silver free hydroxo complexes. Mechanistic studies for R = Ph are consistent with a homogeneous pathway that is bimolecular (ΔH(‡) = 17(2) kcal mol(-1) and ΔS(‡) = -25(6) e.u. and ΔG = 10(2) kcal mol(-1)), first order in [Pt] and substrate.
authors.affiliation: Department of Chemistry, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, Canada. wpiers@ucalgary.ca.
authors.forename: Tracy L
authors.initials: TL
authors.lastname: Lohr
authors.forename: Warren E
authors.initials: WE
authors.lastname: Piers
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Sgro
authors.forename: Masood
authors.initials: M
authors.lastname: Parvez