Crystal Growth and Crystal Structures of Gold(V) Compounds: Cu(AuF6)2, Ag(AuF6)2, and O2(CuF)3(AuF6)4 ⋅ HF

Abstract

AbstractCrystal growth from anhydrous hydrogen fluoride solutions of M2+(M=Cu, Ag) and [AuF6]−gave M(AuF6)2salts (M=Cu, Ag). Similar attempts to prepare single crystals of the corresponding nickel, zinc and magnesium salts failed. The crystal structure of Cu(AuF6)2consists of layers of Cu2+cations connected by [AuF6]−anions, thus forming slabs. Only van der Waals interactions exist between adjacent slabs. The crystal structure of Ag(AuF6)2consists of a three‐dimensional framework in which Ag+cations are linked by [AuF6]−anions. Both structures are members of the MII(XVF6)2family, in which seven different structure types have been observed to date. In the crystal structure of O2(CuF)3(AuF6)4 ⋅ HF, the bridging AuF6units connect [−Cu−F−Cu−F−]∞chains to form stacks between which O2+cations and HF molecules are located.