An Unprecedented Example of Pt 4 Ag 3 Cluster Formation: Synthesis and Crystal Structure of [Pt 2 (dppy) 4 (μ 3 S) 2 Ag 3 (μ 3 S) 2 Pt 2 (dppy) 4 ] 3+

An isosceles triangle of silver atoms is present in the novel heptanuclear heterometallic complex 1 (the structure of the core of the cation is shown on the right). In the solid state, 1 luminesces at 560 nm, which can be attributed to a metal cluster core d-s/S → Ag ligand-to-metal charge transfer, dppy = diphenylpyridin-2-ylphosphane.