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Gallium(III) iodide

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Gallium(III) iodide
Names


Other names gallium triiodide
Identifiers
CAS Number	13450-91-4^N
3D model (JSmol)	Interactive image
ChemSpider	75316^Y
ECHA InfoCard	100.033.269
EC Number	236-611-6
PubChem CID	83478
CompTox Dashboard (EPA)	DTXSID7065467
InChI InChI=1S/Ga.3HI/h;31H/q+3;;;/p-3^Y Key: DWRNSCDYNYYYHT-UHFFFAOYSA-K^Y InChI=1/Ga.3HI/h;31H/q+3;;;/p-3 Key: DWRNSCDYNYYYHT-DFZHHIFOAW
SMILES I[Ga](I)I
Properties
Chemical formula	GaI₃
Molar mass	450.436 g/mol
Appearance	light yellow powder
Density	4.5 g/cm³^[1]
Melting point	212 °C (414 °F; 485 K)^[1]
Boiling point	340 °C (644 °F; 613 K)^[1]
Solubility in water	decomposes
Magnetic susceptibility (χ)	−149.0·10⁻⁶cm³/mol
Thermochemistry^[2]
Heat capacity (C)	100 J/(mol·K)
Std molar entropy (S^⦵₂₉₈)	205.0 J/(mol·K)
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	−238.9 kJ/mol
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314, H317, H334, H335, H361
Precautionary statements	P280, P305+P351+P338, P310
NFPA 704 (fire diamond)	4 0 1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is ^YN ?) Infobox references

Gallium(III) iodide is the inorganic compound with the formula Ga I₃. A yellow hygroscopic solid, it is the most common iodide of gallium.^[3] In the chemical vapor transport method of growing crystals of gallium arsenide uses iodine as the transport agent. In the solid state, it exists as the dimer Ga₂I₆.^[4] When vaporized, its forms GaI₃ molecules of D_3h symmetry where the Ga–I distance is 2.458 Angstroms.^[5]

Gallium triiodide can be reduced with gallium metal to give a green-colored gallium(I) iodide. The nature of this species is unclear, but it is useful for the preparation of gallium(I) and gallium(II) compounds.^[6]^[7]

References[edit]

^ ^a ^b ^c Haynes, p. 4.63

^ Haynes, p. 5.20

^ Donges, E. (1963). "Gallium(III) Iodide". In Brauer, G. (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 1. NY, NY: Academic Press. p. 846.

^ Brünig, C.; Locmelis, S.; Milke, E.; Binnewies, M. (2006). "Chemischer Transport fester Lösungen. 27. Mischphasenbildung und chemischer Transport im System Zn Se/Ga As". Zeitschrift für Anorganische und Allgemeine Chemie. 632 (6): 1067–1072. doi:10.1002/zaac.200600008.

^ Haynes, p. 9.23

^ Baker, Robert J.; Jones, Cameron (2005). ""GaI": A versatile reagent for the synthetic chemist". Dalton Trans (8): 1341–1348. doi:10.1039/b501310k. hdl:2262/69572. PMID 15824768.

^ Green, Shaun P.; Jones, Cameron; Stasch, Andreas; Rose, Richard P. (2007). "'GaI': A new reagent for chemo- and diastereoselective C–C bond forming reactions". New J. Chem. 31: 127–134. doi:10.1039/b613669a.