Alkaline Earth Peroxymonosulfates

Description

Many of the peroxymonosulfates have never been formed. An example is beryllium peroxymonosulfate. Magnesium peroxymonosulfate has the molecular formula of MgSO5 and the molecular weight of 136.3682 g/mol. It can be produced by the reaction of magnesium hydroxide, fuming sulfuric acid and hydrogen peroxide:
Mg(OH)2 +H2O2 +H2SO4 ? MgSO5 + 3H2O
The hexahydrate results upon evaporation and recrystallization of the solution at a low temperature of ～15°C. This salt is offered for sale as MgSO5·6H2O and is used as a fumigant and biocide in hospitals. It is a very strong oxidizing agent and care must be taken in handling. This compound provides powerful nonchlorine oxidation for a wide variety of industrial and consumer uses. Its applications may be found in pool and spa shock and disinfection, oral hygiene formulations, polymerization initiator and oxygen-releasing agent in aquiculture.
Strontium peroxymonosulfate would have the molecular formula of SrSO5 and the molecular weight of 152.1412 g/mol. It could be produced by the reaction of calcium hydroxide, fuming sulfuric acid and hydrogen peroxide:
Sr(OH)2+H2O2+H2SO4 ? SrSO5+ 3H2O
Upon evaporation and recrystallization of the solution at a low temperature of ～15°C, it is expected that a hexahydrate would result. However, the scientific literature is completely devoid of mention of the preparation of such a salt and no physical or chemical properties have been documented. It is not known whether this salt or others like it could be prepared or are stable. Since both Mg and Ba form stable compounds, the mystery of why this salt has not been described remains unknown.
Barium peroxy-monosulfate has the molecular formula of BaSO5 and the molecular weight of 249.3932 g/mol. It can be produced by the reaction of barium hydroxide, fuming sulfuric acid and hydrogen peroxide:
Ba(OH)2+H2O2+H2SO4 ? BaSO5+ 3H2O
The question of the existence of hydrates remains unknown since this salt is soluble, is very toxic and is used as a solution. It is referred to in a few patents that describe methods of producing pyrrolidine derivatives.