Synthetic, structural, electrochemical, and theoretical studies of heterometallic aggregates with a [Pt-2(mu-S)(2)M] core (M=Hg, Au)

Xu XL; Fong SWA; Li ZH; Loh ZH; Zhao F; Vittal JJ; Henderson W; Khoo SB; Hor TSA

Inorganic Chemistry, Vol.41, No.25, 6838-6845, 2002

Xu XL, Fong SWA, Li ZH, Loh ZH, Zhao F, Vittal JJ, Henderson W, Khoo SB, Hor TSA

Novel electroactive multimetallic compounds based on the {Pt-2(mu(2)-S)(2)M} core, viz. [Pt-2(PPh3)(4)(mu(3)-S)(2)HgFc]PF6 (1) [Fc = (eta(5)-C5H4)Fe(eta(5)-C5H5)] and [Pt-2(PPh3)(4)(mu(3)-S)(2)Hg(2)Fc'](PF6)(2) (2) [Fc' = Fe(eta(5)-C5H4)(2)], have been synthesized under the guide of electrospray mass spectrometry. The electrochemistry of these ferrocene funtionalized compounds together with the reported [Pt-2(PPh3)(4)(mu(3)-S)(2)HgPPh3](PF6)(2) (3), [Pt-2(PPh3)(4)(mu(2)-S)(mu(3)-S)HgPh]PF6 (4), and [Pt-2(PPh3)(4)-(mu(2)-S)(mu(3)-S)AuPPh3]PF6 (5) have been investigated using cyclic voltammetry and DFT calculations, These results point to a prominent ligand-based oxidation.