Phosphorus acid
Phosphorus acids are oxoacids of phosphorus. There are a large number of these and some cannot be isolated and are only known through their salts. Examples include[1]:
- H3PO2; Hypophosphorous acid or Phosphinic acid, H2PO(OH), monobasic acid, contains P in oxidation state +1
- H3PO3; Phosphorous acid or Phosphonic acid,HPO(OH)2, dibasic acid, contains P in oxidation state +3
- H3PO4; Phosphoric acid, PO(OH)3, tribasic acid, contains P in oxidation state +5
- H3PO5; Peroxomonophosphoric acid, OP(OH)2OOH, tribasic acid, contains P in oxidation state +5
- H4P2O6; Hypophosphoric acid, (OH)2P(O)−P(O)(OH)2, tetrabasic acid, contains P in formal oxidation state +4
- H4P2O7; Pyrophosphoric acid, (OH)2(O)P-O-P(O)(OH)2, tetrabasic acid, contains P in formal oxidation state +5
In addition there are a range of polyphosphoric acids such as
as well as acids with mixed oxidation states e.g.
- H4P2O6; H(OH)(O)P-O-P(O)(OH)2, containing P in oxidation state +3 and +5
External links
References
- ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Oxford: Butterworth-Heinemann. ISBN 0080379419.