Rhodium (III) bromide

Rhodium bromide
Rhodium bromide
Are common
Systematic ; name	Rhodium (III) bromide
Traditional names	rhodium bromide
Chem. formula	RhBr 3
Physical properties
condition	brown powder
Molar mass	342.62 g / mol
Density	5.5 g / cm³
Thermal properties
T. decomp.	≈500 ° C
Classification
Reg. CAS number
PubChem
Reg. EINECS number
Smiles
Inchi
ChemSpider

Rhodium (III) bromide is an inorganic compound, a salt of rhodium metal and hydrobromic acid with the formula RhBr ₃ , brown powder.

Content

Getting

Effect of bromine on heated powdered rhodium:

{\mathsf {2Rh+3Br_{2}\ {\xrightarrow {250^{o}C}}\ 2RhBr_{3}}}

{\ displaystyle {\ mathsf {2Rh + 3Br_ {2} \ {\ xrightarrow {250 ^ {o} C}} \ 2RhBr_ {3}}}}

Physical Properties

Rhodium (III) bromide forms brown crystals of monoclinic syngony , space group C 2 / m , cell parameters a = 0.627 nm, b = 1.085 nm, c = 0.635 nm, β = 109.0 °, Z = 4.

Chemical Properties

Decomposes on heating:

{\mathsf {2RhBr_{3}\ {\xrightarrow {\approx 500^{o}C}}\ 2Rh+3Br_{2}}}

{\ displaystyle {\ mathsf {2RhBr_ {3} \ {\ xrightarrow {\ approx 500 ^ {o} C}} \ 2Rh + 3Br_ {2}}}}

With a solution of ammonia forms complex salts:

{\mathsf {RhBr_{3}+NH_{3}\cdot H_{2}O\ {\xrightarrow {}}\ [Rh(NH_{3})_{5}Br]Br_{2},[Rh(NH_{3})_{5}(H_{2}O)]Br_{2},[Rh(NH_{3})_{6}]Br_{3},[Rh(NH_{3})_{3}Br_{3}]}}

{\ displaystyle {\ mathsf {RhBr_ {3} + NH_ {3} \ cdot H_ {2} O \ {\ xrightarrow {}} \ [Rh (NH_ {3}) _ {5} Br] Br_ {2}, [Rh (NH_ {3}) _ {5} (H_ {2} O)] Br_ {2}, [Rh (NH_ {3}) _ {6}] Br_ {3}, [Rh (NH_ {3} ) _ {3} Br_ {3}]}}}

Literature

Ripan R., Chetyanu I. Inorganic chemistry. Chemistry of metals. - M .: Mir, 1972. - T. 2. - 871 p.
Inorganic Synthesis Guide: 6 Vol. / Ed. Brower, G. - Moscow : Mir, 1985 .-- V. 5 .-- 360 p.