Diastereomeric metallatetrahedron complexes of the type Re2(MPPh3)(M′PPh3)(µ-PCy2)(CO)7(–)-thiocamphanate (M = Ag, Au, M′ = Cu, Ag, Au): synthesis, structure and CD data - Haupt, Hans-Jürgen; Seewald, Oliver; Flörke, Ulrich; Buß, Volker; Weyhermüller, Thomas (Journal of the Chemical Society, Dalton Transactions)