Molybdenum bromide (II)

Molybdenum bromide
Molybdenum bromide
Are common
Systematic ; name	Molybdenum bromide (II)
Traditional names	Methyl molybdenum; molybdenum dibromide hexamer
Chem. formula	MoBr 2
Physical properties
condition	orange matter
Molar mass	255.76 g / mol
Density	4.88 g / cm³
Classification
Reg. CAS number
Pubchem
SMILES
Inchi
Chemspider

Molybdenum bromide (II) is an inorganic compound, a salt of a metal of molybdenum and hydrobromic acid with the formula MoBr ₂ , an orange substance, insoluble in water.

Content

Getting

Effect of bromine on heated molybdenum:

{\mathsf {Mo+Br_{2}\ {\xrightarrow {600-700^{o}C}}\ MoBr_{2}}}

{\ displaystyle {\ mathsf {Mo + Br_ {2} \ {\ xrightarrow {600-700 ^ {o} C}} \ MoBr_ {2}}}}

The decomposition of molybdenum bromide (III) when heated in an inert atmosphere:

{\mathsf {2MoBr_{3}\ {\xrightarrow {T}}\ MoBr_{2}+MoBr_{4}}}

{\ displaystyle {\ mathsf {2MoBr_ {3} \ {\ xrightarrow {T}} \ MoBr_ {2} + MoBr_ {4}}}}

The reaction of molybdenum (II) chloride with lithium bromide :

{\mathsf {MoCl_{2}+2LiBr\ {\xrightarrow {}}\ MoBr_{2}+2LiCl}}

{\ displaystyle {\ mathsf {MoCl_ {2} + 2LiBr \ {\ xrightarrow {}} \ MoBr_ {2} + 2LiCl}}}

Physical Properties

Molybdenum bromide (II) forms an orange amorphous substance insoluble in water.

Molybdenum bromide molecules are hexameric and have the structure [Mo ₆ Br ₈ ] Br ₄ .

Chemical Properties

Soluble in hydrohalic acids:

{\mathsf {[Mo_{6}Br_{8}]Br_{4}+6HCl\ {\xrightarrow {}}\ H_{2}[Mo_{6}Br_{8}Cl_{6}]+4HBr}}

{\ displaystyle {\ mathsf {[Mo_ {6} Br_ {8}] Br_ {4} + 6HCl \ {\ xrightarrow {}} \ H_ {2} [Mo_ {6} Br_ {8} Cl_ {6}] + 4HBr}}}

It is dissolved in alkalis :

{\mathsf {[Mo_{6}Br_{8}]Br_{4}+6KOH\ {\xrightarrow {}}\ K_{2}[Mo_{6}Br_{8}(OH)_{6}]+4KBr}}

{\ displaystyle {\ mathsf {[Mo_ {6} Br_ {8}] Br_ {4} + 6KOH \ {\ xrightarrow {}} \ K_ {2} [Mo_ {6} Br_ {8} (OH) _ {6 }] + 4KBr}}}

Literature

Chemical Encyclopedia / Redkol .: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1992. - Vol. 3. - 639 p. - ISBN 5-82270-039-8 .
Chemist Handbook / Redkol .: Nikolsky B.P. et al. - 3rd ed., Rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
Ripan R., Chetyanu I. Inorganic chemistry. Metal Chemistry. - M .: Mir, 1972. - T. 2. - 871 p.