Molybdenum(IV) bromide

Molybdenum(IV) bromide, also known as molybdenum tetrabromide, is the inorganic compound with the formula MoBr4. It is a black solid. MoBr4 has been prepared by treatment of molybdenum(V) chloride with hydrogen bromide:
 * 2 MoCl5 + 10 HBr  →  2 MoBr4  +  10 HCl  +  Br2

The reaction proceeds via the unstable molybdenum(V) bromide, which releases bromine at room temperature.

Molybdenum(IV) bromide can also be prepared by oxidation of molybdenum(III) bromide with bromine.