Magnesium Bromite

Preparation

Magnesium bromite has the molecular formula of Mg(BrO2)2 and a molecular weight of 248.1106 g/mol. It can be prepared by a number of means including the disproportionation of hypobromous acid, prepared by dissolving bromine in water:
Mg(OH)2＋2HBrO±heat→Mg(BrO2)2
However, a by-product of the reaction is likely to be MgBr. The best way to prepare the pure salt, uncontaminated by other forms is to react sodium bromate with HBr gas in solution:
3Mg(OH)2 (solid)＋ 2NaBrO3＋ 6HBr(gas)
→3Mg(BrO2)2(aq)＋ 2NaBr(aq)
Whether this salt can be isolated from solution remains a mystery since no research papers have appeared describing its physical or chemical properties.
Magnesium bromite is not available commercially.