Sodium Tetraazidoaurate(III)—From Na[AuCl <sub>4</sub> ]·2H <sub>2</sub> O to Na[Au(N <sub>3</sub> ) <sub>4</sub> ] and Beyond One Step at a Time

The novel sodium tetrachlorido-/azidoaurate(III) dihydrates Na[AuCl<sub>4-</sub> <sub>x</sub>(N<sub>3</sub>)<sub>x</sub>]·2H<sub>2</sub>O (x = 0, 1, 2, 3, 4) provide the first example of a complete series of gradual substitution on square planar complex anions to be described. Transparent yellow to dark orange single crystals of these phases were synthesized by reaction of NaN<sub>3</sub> and AuCl<sub>3</sub> or HAuCl<sub>4</sub> in different molar ratios from aqueous solution. Controlled dehydration of Na[Au(N<sub>3</sub>)<sub>4</sub>]·2H<sub>2</sub>O led to Na[Au(N<sub>3</sub>)<sub>4</sub>]·H<sub>2</sub>O and Na[Au(N<sub>3</sub>)<sub>4</sub>] in form of orange microcrystalline powders, the latter being a highly explosive material. Predominant structural features of all phases are discrete anions [AuCl<sub>4-</sub> <sub>x</sub>(N<sub>3</sub>)<sub>x</sub>]<sup>-</sup> with gold in an ordered square planar coordination of azide/chloride anions. Vibrational spectra show good agreement with other known azidoaurates(III).

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Journal
Chemistry - A European Journal
Published
2026-03-26
DOI
https://doi.org/10.1002/chem.202502800
Primary Topic
Inorganic Chemistry and Materials
Type
article
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article

Sodium Tetraazidoaurate(III)—From Na[AuCl 4 ]·2H 2 O to Na[Au(N 3 ) 4 ] and Beyond One Step at a Time

Peter Höhn, Raúl Cardoso‐Gil, Franziska Jach, Ayberk Yılmaz et al.
Chemistry - A European Journal
Inorganic Chemistry and Materials
article

Sodium Tetraazidoaurate(III)—From Na[AuCl 4 ]·2H 2 O to Na[Au(N 3 ) 4 ] and Beyond One Step at a Time

Peter Höhn, Raúl Cardoso‐Gil, Franziska Jach, Ayberk Yılmaz, Markus A. Schmidt, Alexander Ovchinnikov, Thomas Doert, Mehmet Somer, Yurii Prots, Helge Rosner, Joannis Psilitelis
article en

Abstract

The novel sodium tetrachlorido-/azidoaurate(III) dihydrates Na[AuCl<sub>4-</sub> <sub>x</sub>(N<sub>3</sub>)<sub>x</sub>]·2H<sub>2</sub>O (x = 0, 1, 2, 3, 4) provide the first example of a complete series of gradual substitution on square planar complex anions to be described. Transparent yellow to dark orange single crystals of these phases were synthesized by reaction of NaN<sub>3</sub> and AuCl<sub>3</sub> or HAuCl<sub>4</sub> in different molar ratios from aqueous solution. Controlled dehydration of Na[Au(N<sub>3</sub>)<sub>4</sub>]·2H<sub>2</sub>O led to Na[Au(N<sub>3</sub>)<sub>4</sub>]·H<sub>2</sub>O and Na[Au(N<sub>3</sub>)<sub>4</sub>] in form of orange microcrystalline powders, the latter being a highly explosive material. Predominant structural features of all phases are discrete anions [AuCl<sub>4-</sub> <sub>x</sub>(N<sub>3</sub>)<sub>x</sub>]<sup>-</sup> with gold in an ordered square planar coordination of azide/chloride anions. Vibrational spectra show good agreement with other known azidoaurates(III).

Chemistry - A European Journal
Koç University (TR), Max Planck Institute for Chemical Physics of Solids (DE), Fraunhofer Institute for Integrated Systems and Device Technology (DE), Hochschule für Technik und Wirtschaft Dresden – University of Applied Sciences (DE), Istanbul Technical University (TR), Technische Universität Dresden (DE), University of Tübingen (DE)
Openalex Percentile: Top 9%
Inorganic Chemistry and Materials
DOIOpen Access PDFOpenAlex
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