Sulfur peroxymonosulfuric acids

Sulfuric acid, H2SO4, the most important commercial sulfur compound (see Sulfuric acid and sulfur trioxide), and peroxymonosulfuric acid [7722-86-3] (Caro s acid), H2SO, are discussed elsewhere (see Peroxides and peroxide compounds, inorganic). The lower valent sulfur acids are not stable species at ordinary temperatures. Dithionous acid [15959-26-9] H2S2O4, sulfoxyHc acid [20196-46-7] H2SO2, and thiosulfuric acid [13686-28-7] H2S2O2 are unstable species. A discussion of efforts to isolate and characterize the unstable sulfur acids is given (330). 

Peracids. Peracids are compounds containing the functional group —OOH derived from an organic or inorganic acid functionaHty. Typical stmctures include CH2C(0)OOH derived from acetic acid and H0S(0)200H (peroxymonosulfuric acid) derived from sulfuric acid. Peracids have... 

The peroxyacids containing —O-OH groups, are formed with all the transition elements in groups 4, 5, 6 of the periodic tabic, with main group elements 4 and 5 as well as elements of atomic numbers from boron to sulfur, inclusive. Representative peroxyacids are peroxymonosulfuric acid,... 

Finally, a number of commonly occurring atmospheric trace species are converted to reactive electrophiles in concentrated sulfuric acid solutions. For example, nitric acid is converted to NO2, which is a potent nitrating agent for aromatic compounds (Liler 1971), and hydrogen peroxide can be converted to peroxymonosulfuric acid (HOOSO2OH), which is a strong oxidant (Mozurkewich 1995 Dalleska et al. 2000). 

The oxidation of aquated sulfur dioxide proceeds via a nucleophilic displacement of HSO3 by H202 to form peroxymonosulfurous acid as an intermediate that, in turn, undergoes an acid-catalyzed (both specific-acid and general-acid) rearrangement to give the products as described by the stoichiometry of Eq. 46 (McArdle and Hoffmann, 1983). The mechanism can be written as follows ... 

Peroxyadds and peracids. Test cold solutions of sodium peroxyborate, potassium or ammonium peroxydisulfate, and potassium perchlorate with dilute sulfuric acid and titanic sulfate. If you have not already done so, perform Test 2 of Experiment 48 (on peroxymonosulfuric acid). 

Prepare a solution of peroxymonosulfuric acid, H2SO5, by mixing a little ice-cold concentrated sulfuric acid with potassium peroxydisulfate, keeping the mixture ice-cold for a minute, and then diluting with water. Repeat, with this solution, the tests given above. 

Weissenstein An electrolytic process for making hydrogen peroxide by the electrolysis of sulfuric acid. Peroxodisulfuric acid, HjSjOg, is formed first this is then hydrolyzed via peroxymonosulfuric acid ... 

Related compounds Peroxymonosulfuric acid Sulfur trioxide Oleum... 

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