Phosphonic acid
Tautomers of H3PO3:
phosphonic acid (left)
phosphorous acid (right)
The general structure of an organic phosphonic acid
In inorganic chemistry, phosphonic acid is a phosphorus oxoacid with a formula of H3PO3, more commonly known as phosphorous acid. It exists in solution as two tautomers, the major one being HP(O)(OH)2 and the minor one P(OH)3. The former is sometimes termed [...]