The reactions of [M(dppe) 2] (M=Pd, Pt) with elemental selenium or tellurium: preparation and structure of the platinum polyselenide [PtSe 4(dppe)

Abstract

Reaction of [Pt(dppe) 2] (dppe=1,2-bis(diphenylphosphino)ethane) with elemental selenium in toluene under reflux, or of [PtCl 2(dppe)] with lithium polyselenide in tetrahydrofuran, leads in good yield to the complex [PtSe 4(dppe)] whose structure has been determined by X-ray crystallography. Reaction of [Pt(dppe) 2] with elemental tellurium, followed by treatment with dichloromethane, leads to isolation of the salt [Pt 3(μ 3-Te) 2(dppe) 3]Cl 2. [Pd(dppe) 2] reacts with elemental selenium to give [Pd 2(μ-Se) 2(dppe) 2] or [Pd 3(μ 3-Se) 2(dppe) 3]Cl 2, depending on the conditions.