The First Alkaline-Earth Azidoaurate(III), Ba[Au(N3 )4 ]2 ⋅ 4 H2 O

Yaprak Subaşı; Elif Sena Tekin; Yurii Prots; Franziska Jach; Mehmet Somer; Semih Afyon; Peter Höhn

doi:10.1002/chem.202203501

The First Alkaline-Earth Azidoaurate(III), Ba[Au(N₃ )₄ ]₂ ⋅ 4 H₂ O

Chemistry. 2023 Feb 21;29(11):e202203501. doi: 10.1002/chem.202203501. Epub 2023 Jan 17.

Authors

Yaprak Subaşı¹, Elif Sena Tekin¹, Yurii Prots², Franziska Jach^{2

3

4}, Mehmet Somer¹, Semih Afyon⁵, Peter Höhn²

Affiliations

¹ Department of Chemistry, Koç University, Rumelifeneri Yolu, 34450, Sarıyer, Istanbul, Turkey.
² Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, 01187, Dresden, Germany.
³ Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.
⁴ Fraunhofer Institute for Integrated Systems and Device, Technology IISB, Schottkystraße 10, 91058, Erlangen, Germany.
⁵ Energy Technologies Institute, Gebze Technical University, 41400, Gebze/, Kocaeli, Turkey.

PMID: 36546826
DOI: 10.1002/chem.202203501

Abstract

Transparent, dark orange Ba[Au(N₃ )₄ ]₂ ⋅ 4 H₂ O was synthesized by reaction of Ba(N₃ )₂ and AuCl₃ or HAuCl₄ in aqueous solution. The novel barium tetraazidoaurate(III) tetrahydrate crystallizes in the monoclinic space group Cc (no. 9) with a=1813.68(17) pm, b=1737.95(11) pm, c=682.04(8) pm and β=108.849(4)°. The predominant structural features of Ba[Au(N₃ )₄ ]₂ ⋅ 4 H₂ O are two crystallographically independent discrete anions [Au(N₃ )₄ ]^- with gold in a tetragonal planar coordination by nitrogen. Vibrational spectra show good agreement with those of other azidoaurates(III). Upon drying, this salt was shown to be a highly explosive material.

Keywords: alkaline-earth metals; azides; crystal structures; gold; vibrational spectroscopy.