Tin(IV) iodide

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Tin(IV) iodide
Photograph of a sample of tin tetraiodide Ball-and-stick model of the unit cell of tin tetraiodide
Structure and dimensions of the tin(IV) iodide molecule Ball-and-stick model of the tin(IV) iodide molecule
CAS number 7790-47-8 N
PubChem 11490544
ChemSpider 23033 N
EC number 232-208-4
Jmol-3D images Image 1
Molecular formula SnI4
Molar mass 626.328 g mol−1
Appearance red-orange solid
Density 4.56 g cm−3
Melting point 144.5 °C (292.1 °F; 417.6 K)
Boiling point 348.5 °C (659.3 °F; 621.6 K)
Refractive index (nD) 2.106
Crystal structure Cubic, cP40
Space group P-43m, No. 205
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Tin(IV) iodide, also known as stannic iodide, is the chemical compound with the formula SnI4. This tetrahedral molecule crystallises as a bright orange solid that dissolves readily in nonpolar solvents such as benzene.[1]

The compound is usually prepared by the reaction of iodine and tin:[2]

Sn + 2 I2 → SnI4

The compound hydrolyses in water.[3] In aqueous hydroiodic acid, it reacts to form a rare example of a metal hexaiodide:[2]

SnI4 + 2 I → [SnI6]2−

See also[edit]


  1. ^ Chemistry : Periodic Table : tin : compound data [tin (IV) iodide]
  2. ^ a b Moeller, T., Edwards, D. C., Brandt, R. L. and Kleinberg, J. (1953). "Tin(IV) Iodide (Stannic Iodide)". Inorganic Syntheses. Inorganic Syntheses 4: 119–121. doi:10.1002/9780470132357.ch40. ISBN 978-0-470-13235-7. 
  3. ^ Hickling, G. G. (1990). "Gravimetric analysis: The synthesis of tin iodide". J. Chem. Educ. 67 (8): 702–703. doi:10.1021/ed067p702.