Molybdenum Oxybromide

Molybdenum forms a Molybdenum Oxybromide, MoO₂Br₂, which may be obtained (a) by the interaction of bromine-vapour and heated molybdenum dioxide; (b) by heating together potassium bromide, molybdenum trioxide, and boric or phosphoric acid; or (c) by interaction in presence of oxygen of molybdenum trioxide and certain metallic bromides. It is a stable but deliquescent crystalline substance, having a reddish-yellow colour.