Antimony Iodide (III)

Antimony iodide
Antimony iodide
Are common
Systematic ; name	Antimony Triiodide
Traditional names	antimony iodide
Chem. formula	Sbi 3
Physical properties
condition	from red to greenish yellow crystals
Molar mass	502.47 g / mol
Density	4.768; 4.92 g / cm³
Thermal properties
T. melt.	167; 170.5 ° C
T. bale.	397; 401 ° C
Enthalpy of Education	-100 kJ / mol
Classification
Reg. CAS number	7790-44-5
PubChem
Reg. EINECS number
Smiles
Inchi
UN number
ChemSpider

Antimony (III) iodide is a binary inorganic compound of antimony and iodine with the formula SbI ₃ , dark red, burgundy crystals react with water.

Content

Getting

Dissolution of antimony metal in a solution of iodine in carbon disulfide or carbon tetrachloride:

{\mathsf {2Sb+3I_{2}\ {\xrightarrow {}}\ 2SbI_{3}}}

{\ displaystyle {\ mathsf {2Sb + 3I_ {2} \ {\ xrightarrow {}} \ 2SbI_ {3}}}}

The action of potassium iodide dissolved in acetone on antimony sulfide or chloride :

{\mathsf {Sb_{2}S_{3}+6KI\ {\xrightarrow {}}\ 2SbI_{3}+3K_{2}S}}

{\ displaystyle {\ mathsf {Sb_ {2} S_ {3} + 6KI \ {\ xrightarrow {}} \ 2SbI_ {3} + 3K_ {2} S}}}

{\mathsf {SbCl_{3}+3KI\ {\xrightarrow {}}\ SbI_{3}+3KCl}}

{\ displaystyle {\ mathsf {SbCl_ {3} + 3KI \ {\ xrightarrow {}} \ SbI_ {3} + 3KCl}}}

Physical Properties

Antimony (III) iodide forms crystals of three modifications:

red hexagonal prisms, d = 5.01 g / cm³, melt at 168 ° C, boil at 401 ° C, space group R 3 , cell parameters a = 0.748 nm, c = 2.089 nm, Z = 6.
yellow rhombic crystals;
greenish-yellow monoclinic prisms, d = 4.768 g / cm³, melt at 172 ° C.

React with water. It is soluble in ethanol , acetone , carbon disulfide , hydrogen chloride , hydrogen bromide , ammonia , isopropyl alcohol.

It is easily cleared by sublimation in an inert atmosphere or in vacuum.

Chemical Properties

Hydrolyzed by water to orange, insoluble in water, but soluble in isopropyl alcohol, crystals:

{\mathsf {SbI_{3}\ {\xrightarrow[{-HI}]{H_{2}O}}\ SbOI,Sb_{4}O_{5}I_{2}}}

{\ displaystyle {\ mathsf {SbI_ {3} \ {\ xrightarrow [{- HI}] {H_ {2} O}} \ SbOI, Sb_ {4} O_ {5} I_ {2}}}}

With the presence of hydrogen iodide in the presence of a small amount of water, it forms crystals of tetraiodosurboxylic acid:

{\mathsf {SbI_{3}+HI+5H_{2}O\ {\xrightarrow {}}\ H[SbI_{4}]\cdot 5H_{2}O}}

{\ displaystyle {\ mathsf {SbI_ {3} + HI + 5H_ {2} O \ {\ xrightarrow {}} \ H [SbI_ {4}] \ cdot 5H_ {2} O}}}

With alkali metal iodides forms complex salts:

{\mathsf {SbI_{3}+KI\ {\xrightarrow {}}\ K[SbI_{4}]}}

{\ displaystyle {\ mathsf {SbI_ {3} + KI \ {\ xrightarrow {}} \ K [SbI_ {4}]}}}

Literature

Chemical Encyclopedia / Editorial Board: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1995. - T. 4. - 639 p. - ISBN 5-82270-092-4 .
Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 2nd ed., rev. - M.-L.: Chemistry, 1966. - T. 1. - 1072 p.
Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
Ripan R., Chetyanu I. Inorganic chemistry. Chemistry of metals. - M .: Mir, 1971. - T. 1. - 561 p.