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Names | |||
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IUPAC name
tin(IV) iodide
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Other names
tin tetraiodide
stannic iodide | |||
Identifiers | |||
3D model (
JSmol)
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ChemSpider | |||
ECHA InfoCard | 100.029.281 | ||
EC Number |
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PubChem
CID
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UNII | |||
CompTox Dashboard (
EPA)
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Properties | |||
SnI4 | |||
Molar mass | 626.328 g mol−1 | ||
Appearance | red-orange solid | ||
Density | 4.56 g cm−3 | ||
Melting point | 143 °C (289 °F; 416 K) | ||
Boiling point | 348.5 °C (659.3 °F; 621.6 K) | ||
Refractive index (nD)
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2.106 | ||
Structure | |||
Cubic, cP40 | |||
Pa-3 No. 205 | |||
Related compounds | |||
Other
anions
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Tin(IV) fluoride Tin(IV) chloride Tin(IV) bromide | ||
Other
cations
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Carbon tetraiodide Silicon tetraiodide Germanium tetraiodide | ||
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
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Tin(IV) iodide, also known as stannic iodide, is the chemical compound with the formula SnI4. This tetrahedral molecule crystallizes 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]
The compound hydrolyses in water. [3] In aqueous hydroiodic acid, it reacts to form a rare example of a hexaiodometallate: [2]
Tin(IV) iodide is an orange solid under standard conditions. [3] It has a cubic crystal structure with the space group Pa3 (space group no. 205), the lattice parameter a = 1226 pm and eight formula units per unit cell. [4] This corresponds approximately to a cubic close packing of iodine atoms in which 1/8 of all tetrahedral gaps are occupied by tin atoms. This leads to discrete tetrahedral SnI4 molecules. [5]