Gallium(III) iodide

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 476993585

| Name = Gallium(III) iodide

| ImageFile = Gallium-iodide-3D-balls.png

| ImageFile1 = Gallium-iodide-3D-vdW.png

| ImageName = Gallium(III) iodide

| OtherNames = gallium triiodide

| IUPACName =

| SystematicName =

| Section1 = {{Chembox Identifiers

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 75316

| EINECS = 236-611-6

| InChI = 1/Ga.3HI/h;3*1H/q+3;;;/p-3

| InChIKey = DWRNSCDYNYYYHT-DFZHHIFOAW

| SMILES = I[Ga](I)I

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/Ga.3HI/h;3*1H/q+3;;;/p-3

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = DWRNSCDYNYYYHT-UHFFFAOYSA-K

| CASNo_Ref = {{cascite|changed|??}}

| CASNo = 13450-91-4

| PubChem = 83478

}}

| Section2 = {{Chembox Properties

| Formula = GaI₃

| MolarMass = 450.436 g/mol

| Appearance = light yellow powder

| Density = 4.5 g/cm³Haynes, p. 4.63

| Solubility = decomposes

| MeltingPtC = 212

| MeltingPt_ref =

| BoilingPtC = 340

| BoilingPt_ref =

| MagSus = −149.0·10⁻⁶ cm³/mol

}}

| Section4 = {{Chembox Thermochemistry

| Thermochemistry_ref = Haynes, p. 5.20

| DeltaGf =

| DeltaHc =

| DeltaHf = −238.9 kJ/mol

| Entropy = 205.0 J/(mol·K)

| HeatCapacity = 100 J/(mol·K)

}}

| Section5 =

| Section6 =

| Section7 = {{Chembox Hazards

| GHSPictograms = {{GHS05}}{{GHS07}}{{GHS08}}

| GHSSignalWord = Danger

| HPhrases = {{H-phrases|314|317|334|335|361}}

| PPhrases = {{P-phrases|280|305+351+338|310}}

| NFPA-H = 4

| NFPA-R = 1

| NFPA-F = 0

}}

}}

Gallium(III) iodide is the inorganic compound with the formula GaI₃. A yellow hygroscopic solid, it is the most common iodide of gallium.{{cite book|author=Donges, E. |chapter=Gallium(III) Iodide|title=Handbook of Preparative Inorganic Chemistry, 2nd Ed. |editor=Brauer, G. |publisher=Academic Press|year=1963|place=NY, NY|volume=1|pages=846}} 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, with a diborane structure.{{cite journal|doi=10.1002/zaac.200600008|title=Chemischer Transport fester Lösungen. 27. Mischphasenbildung und chemischer Transport im System Zn Se/Ga As|year=2006|last1=Brünig|first1= C.|last2=Locmelis|first2=S.|last3=Milke|first3=E.| last4=Binnewies|first4=M.|journal=Zeitschrift für Anorganische und Allgemeine Chemie|volume=632|issue=6|pages=1067–1072}} When vaporized, its forms GaI₃ molecules of D_3h symmetry where the Ga–I distance is 2.458 Angstroms.Haynes, p. 9.23

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.{{cite journal|doi=10.1039/b501310k|title="GaI": A versatile reagent for the synthetic chemist |year=2005 |last1=Baker |first1=Robert J. |last2=Jones |first2=Cameron |journal=Dalton Trans |issue=8 |pages=1341–1348 |pmid=15824768 |hdl=2262/69572 |hdl-access=free }}{{cite journal|doi=10.1039/b613669a|title='GaI': A new reagent for chemo- and diastereoselective C–C bond forming reactions |year=2007 |last1=Green |first1=Shaun P. |last2=Jones |first2=Cameron |last3=Stasch |first3=Andreas |last4=Rose |first4=Richard P. |journal=New J. Chem. |volume=31 |pages=127–134 }}