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Gold monoiodide
Names
	IUPAC name Iodogold
	Systematic IUPAC name Gold(I) iodide
	Other names Gold monoiodide; Aurous iodide
Identifiers
CAS Number	10294-31-2;
3D model (JSmol)	Interactive image;
ChemSpider	74478 ;
ECHA InfoCard	100.030.584
PubChem CID	82526;
UNII	T1UDV7ES1A ;
CompTox Dashboard (EPA)	DTXSID9065027 ;
	InChI InChI=1S/Au.HI/h;1H/q+1;/p-1 Key: ATGIETUGWDAYPU-UHFFFAOYSA-M ;
	SMILES [Au]I;
Properties
Chemical formula	AuI
Molar mass	323.871 g/mol
Appearance	Yellowish to greenish-yellow powder
Density	8.25 g/cm3
Magnetic susceptibility (χ)	−91.0·10−6 cm3/mol
Structure
Crystal structure	tetragonal, Pearson symbol tP8, Z = 4
Space group	P42/ncm (No. 138)
Lattice constant	a = 0.435, b = 0.435, c = 1.373 nm
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P302+P352, P305+P351+P338
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Gold monoiodide is the inorganic compound of gold and iodine with the formula AuI. It can be synthesized by dissolving gold powder in an aqueous solution of iodine and potassium iodide.^[3] With Lewis bases, AuI reacts to give numerous complexes.^[4]

Preparation

Gold monoiodide can be obtained by reacting a tetrachloridoauric acid solution with furthermore potassium iodide. It is also possible to produce it by reacting gold and iodine in a protective atmosphere at around 390 °C.^[5]

Properties

Gold monoiodide is a yellow, crystalline powder that gradually decomposes upon contact with water, humidity or light. It has a tetragonal crystal structure with the space group P4₂/ncm (space group no. 138), a = 4.359 Å, c = 13.711 Å.^[5]

References

^ ^a ^b Jagodzinski H. (1959). "Die Kristallstruktur des AuJ". Z. Kristallogr. 112 (1–6): 80–87. Bibcode:1959ZK....112...80J. doi:10.1524/zkri.1959.112.1-6.80. S2CID 96721760.
^ Sigma-Aldrich 398411 (13-12-2021)
^ Wilfling, Marion; Klinkhammer, Karl W. (2010). "Gold(I)-Mediated Silicon-Silicon Bond Metathesis at Room Temperature". Angewandte Chemie International Edition. 49 (18): 3219–3223. doi:10.1002/anie.200905950. PMID 20349479.
^ Tang, Zhongjia; Litvinchuk, A. P.; Lee, Hye-G.; Guloy, Arnold M. (1 September 1998). "Crystal Structure and Vibrational Spectra of a New Viologen Gold(I) Iodide". Inorganic Chemistry. 37 (19): 4752–4753. doi:10.1021/ic980141q. PMID 11670634.
^ ^a ^b Handbuch der präparativen anorganischen Chemie. 2 (3., umgearb. Aufl ed.). Stuttgart: Enke. 1978. ISBN 978-3-432-87813-3.