Tin(II) iodide

Tin(II) iodide, also known as stannous iodide, is the inorganic compound with the formula SnI₂. It is a red-orange solid. It reacts with iodine to give tin(IV) iodide.^[1]

Tin(II) iodide

Sn2+ (I−)2
Names
IUPAC name tin(II) iodide
Other names stannous iodide
Identifiers
CAS Number	10294-70-9 Y
3D model (JSmol)	Interactive image
ChemSpider	23483 Y
ECHA InfoCard	100.030.594
EC Number	233-667-3
PubChem CID	9951390
UNII	OSH64454WG Y
CompTox Dashboard (EPA)	DTXSID40904018
InChI InChI=1S/2HI.Sn/h2*1H;/q;;+2/p-2 N Key: JTDNNCYXCFHBGG-UHFFFAOYSA-L N InChI=1/2HI.Sn/h2*1H;/q;;+2/p-2 Key: JTDNNCYXCFHBGG-NUQVWONBAK
SMILES [Sn](I)I
Properties
Chemical formula	I2Sn
Molar mass	372.519 g·mol−1
Appearance	red to red-orange solid
Density	5.28 g/cm3
Melting point	320 °C (608 °F; 593 K)
Boiling point	714 °C (1,317 °F; 987 K)
Solubility in water	0.98 g/100 g
Related compounds
Other anions	tin dichloride, tin(II) bromide
Other cations	lead(II) iodide
Related compounds	tin tetraiodide
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

Tin(II) iodide can be synthesised by heating metallic tin with a mixture iodine in 2 M hydrochloric acid.^[2][1]

Sn + I₂ → SnI₂

Structture

Structure of solid SnI2. Color code: violet = I, gray = Sn.

It crystallizes in a unique motif. According to X-ray crystallography, some Sn(II) centers are bound to six iodide ligands others Sn(II) sites are distorted.^[3]

References

1. Stolzenberg, Alan M. (2014). "Tin(II) Iodide". Inorganic Syntheses. 36: 240. doi:10.1002/9781118744994.ch44.
2. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 380–381. ISBN 978-0-08-037941-8.
3. Howie, R. A.; Moser, W.; Trevena, I. C. (1972). "The Crystal Structure of Tin(II) Iodide". Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 28 (10): 2965–2971. Bibcode:1972AcCrB..28.2965H. doi:10.1107/S0567740872007290.