Potassium tetracyanidoaurate(III) monohydrate: a redetermination

• Main Authors: Nobuyuki Matsushita, Wataru Noguchi, Rikako Tanaka
• Format: Article
• Language: English
• Published: International Union of Crystallography 2017-03-01
• Series: IUCrData
• Subjects: crystal structure; redetermination; tetracyanidoaurate(III); square-planar coordination
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S2414314617003820

The structure of the title metal complex salt, K[Au(CN)4]·H2O, has been redetermined using X-ray diffraction data at 173 K in order to improve the precision. The previous determination was based on neutron diffraction data [Bertinotti & Bertinotti (1970). Acta Cryst. B26, 422–428]. The title compound crystallizes in the space group P212121 with one potassium cation, one [Au(CN)4]− anion and one water molecule in the asymmetric unit. The AuIII atom lies on a general position and has an almost square-planar coordination sphere defined by four cyanide ligands. Interactions between the potassium cation and N atoms of the complex anion, as well as O—H...N hydrogen bonds, lead to the formation of a three-dimensional framework structure.