Tin (IV) iodide

Structural formula
Wedges to clarify the spatial structure
Space group	Pa 3 (No. 205)
General
Surname	Tin (IV) iodide
other names	Tin tetraiodide Tetraiodostannane
Molecular formula	SnI 4
Brief description	Orange solid
External identifiers / databases
CAS number 7790-47-8 EC number 232-208-4 ECHA InfoCard 100.029.281 PubChem 24631 ChemSpider 23033 Wikidata Q205005
properties
Molar mass	626.328 g · mol -1
Physical state	firmly
density	4.47 g cm −3
Melting point	144.5 ° C
boiling point	364.5 ° C
solubility	Hydrolysis in water 8.35 g / 100 ml in CCl 4 at 22.4 ° C 20.47 g / 100 ml in CCl 4 at 50 ° C 12.02 g / 100 ml in benzene at 20.2 ° C
Refractive index	2,106
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 302-312-314-317-332-334 P: 261-280-305 + 351 + 338-310
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Tin (IV) iodide is an inorganic chemical compound of tin from the group of iodides .

Extraction and presentation

Tin (IV) iodide can be obtained by direct synthesis from the elements or by heating a tin (II) chloride solution with iodine.

${\displaystyle \mathrm {Sn+2\ I_{2}\longrightarrow SnI_{4}} }$

properties

Tin (IV) iodide

Crystal structure of tin (IV) iodide.
__ Sn ⁴⁺      __ I ^-

Tin (IV) iodide is an orange solid that hydrolyzes in water . It has a cubic crystal structure with the space group Pa 3 (space group no. 205) , the lattice parameter a = 1226 pm and eight formula units per unit cell . This corresponds 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 SnI ₄ molecules.

Individual evidence

1. ↑ ^{a b c d e} Moeller, T., Edwards, DC, Brandt, RL and Kleinberg, J .: Tin (IV) Iodide (Stannic Iodide) . In: Inorganic Syntheses . 4, 1953, pp. 119-121. doi : 10.1002 / 9780470132357.ch40 . ( limited preview in Google Book search)
2. ↑ ^{a b c d} data sheet Tin (IV) iodide (PDF) from Strem, accessed on December 25, 2012.
3. ↑ ^{a b c} data sheet Tin (IV) iodide, anhydrous, powder, 99.999% trace metals basis from Sigma-Aldrich , accessed on September 9, 2011 ( PDF ).
4. ^ D'Ans-Lax, paperback for chemists and physicists. Vol. 3 (1998) ISBN 3-540-60035-3 , p. 740.
5. ↑ Hickling, GG: Gravimetric analysis: The synthesis of tin iodide . In: J. Chem. Educ. . 67, No. 8, 1990, pp. 702-703. doi : 10.1021 / ed067p702 .
6. ↑ F. Meller and I. Fankuchen: The crystal structure of tin tetraiodide . In: Acta Crystallographica . 8, 1955, pp. 343-344. doi : 10.1107 / S0365110X55001035 .
7. ^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 970.