Crystal Growth and Crystal Structures of Gold(V) Compounds: Cu(AuF ₆ ) ₂ , Ag(AuF ₆ ) ₂ , and O ₂ (CuF) ₃ (AuF ₆ ) ₄ ⋅ HF

Abstract Crystal growth from anhydrous hydrogen fluoride solutions of M 2+ (M=Cu, Ag) and [AuF 6 ] − gave M(AuF 6 ) 2 salts (M=Cu, Ag). Similar attempts to prepare single crystals of the corresponding nickel, zinc and magnesium salts failed. The crystal structure of Cu(AuF 6 ) 2 consists of layers of Cu 2+ cations connected by [AuF 6 ] − anions, thus forming slabs. Only van der Waals interactions exist between adjacent slabs. The crystal structure of Ag(AuF 6 ) 2 consists of a three‐dimensional framework in which Ag + cations are linked by [AuF 6 ] − anions. Both structures are members of the M II (X V F 6 ) 2 family, in which seven different structure types have been observed to date. In the crystal structure of O 2 (CuF) 3 (AuF 6 ) 4 ⋅ HF, the bridging AuF 6 units connect [−Cu−F−Cu−F−] ∞ chains to form stacks between which O 2 + cations and HF molecules are located.