Contents

Tin(IV) iodide

Tin(IV) iodide

Names
IUPAC name tin(IV) iodide
Other names tin tetraiodide stannic iodide
Identifiers
CAS Number	7790-47-8 Y
3D model (JSmol)	Interactive image
ChemSpider	23033 N
ECHA InfoCard	100.029.281
EC Number	232-208-4
PubChem CID	11490544
UNII	8H688BW69X Y
CompTox Dashboard (EPA)	DTXSID6064876
InChI InChI=1S/4HI.Sn/h4*1H;/q;;;;+4/p-4 N Key: QPBYLOWPSRZOFX-UHFFFAOYSA-J N InChI=1/4HI.Sn/h4*1H;/q;;;;+4/p-4 Key: QPBYLOWPSRZOFX-XBHQNQODAO
SMILES [Sn](I)(I)(I)I
Properties
Chemical formula	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)	2.106
Structure
Crystal structure	Cubic, cP40
Space group	Pa-3 No. 205
Related compounds
Other anions	Tin(IV) fluoride Tin(IV) chloride Tin(IV) bromide
Other cations	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). N verify (what is YN ?) Infobox references

Chemical compound

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]

Sn + 2I₂ → SnI₄

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

SnI₄ + 2 I⁻ → [SnI₆]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]

• Tin(II) iodide
• Tin(IV) chloride