Sulfonic Acid
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A sulfonic acid is an oxoacid that has the following general structural formula.
In the most common sulfonic acids, R is either an alkyl group (alkanesulfonic acid) or an aryl group (arenesulfonic acid).
eg. 1:
Using the symbol Ms, methanesulfonic acid can be shown conveniently as MsOH.
eg. 2:
Using the symbol Ts, p-toluenesulfonic acid can be shown conveniently as TsOH.