Gallium(III) iodide
Gallium(III) iodide
Names
Other names
gallium triiodide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.269 Edit this at Wikidata
EC Number
  • 236-611-6
  • InChI=1S/Ga.3HI/h;3*1H/q+3;;;/p-3 checkY
    Key: DWRNSCDYNYYYHT-UHFFFAOYSA-K checkY
  • InChI=1/Ga.3HI/h;3*1H/q+3;;;/p-3
    Key: DWRNSCDYNYYYHT-DFZHHIFOAW
  • I[Ga](I)I
Properties
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]
decomposes
−149.0·10−6 cm3/mol
Thermochemistry[2]
100 J/(mol·K)
205.0 J/(mol·K)
−238.9 kJ/mol
Hazards
GHS labelling:
GHS05: CorrosiveGHS07: Exclamation markGHS08: Health hazard
Danger
H314, H317, H334, H335, H361
P280, P305+P351+P338, P310
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
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 checkY☒N ?)

Gallium(III) iodide is the inorganic compound with the formula GaI3. 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 D3h 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]

See also

References

  1. ^ a b c Haynes, p. 4.63
  2. ^ Haynes, p. 5.20
  3. ^ 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.
  4. ^ 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.
  5. ^ Haynes, p. 9.23
  6. ^ 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.
  7. ^ 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.

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