Formation of [PtPd2(μ3-X)2(P-P)(dppmX) 2]2+ (X = S, Se; P-P = dppe, 2 × PPh3) aggregates through activation of the chalcogen-rich [PtX4] ring by a PdI-PdI bond

Abstract

Redox addition of the Pd-Pd bond in [Pd2Cl2(dppm) 2] across S-S or Se-Se bond in [Pt(X4- κ2X1,X4)(P-P)] (X = S, Se; P-P = dppe or 2 × PPh3; dppm = bis(diphenylphosphino)methane, dppe = bis(diphenylphosphino)ethane) leads to the isolation of [PtPd 2(μ3-X)2(P-P)(dppmX-κ2X, P4)2]2+ and represents an atom-economy process that converts chalcogen-rich complexes to heterometallic chalcogenide aggregates. Activation of the [PtX4] ring is achieved by tetrachalcogenide reduction and dual oxidation of palladium and phosphine. © 2008 The Royal Society of Chemistry.