Syntheses and Crystal Structures of [Ag123S35(StBu)50] and [Ag344S124(StBu)96

Abstract

On cores: Silver carboxylates react with a mixture of S(tBu)SiMe3 and S(SiMe3)2 (in the presence of a bidentate phosphine ligand) to yield [Ag123S35(StBu)50] (1) or [Ag344S124(StBu)96] (2, see picture: blue Ag+, red S atoms of the StBu groups, yellow S2−, gray C) with maximum diameters of 2.5 (1) or 3.7 nm (2). These clusters can be described as core–shell particles with the {(Ag2S)35Ag3} (1) and the {(Ag2S)124} (2) cores surrounded by shells of AgStBu units.