Nitronate

A nitronate in organic chemistry is an anion with the general structure R1R2C=N+(−O−)2, containing the =N+(−O−)2 functional group, where R can be hydrogen, halogen, organyl group or other groups. It is the anion of nitronic acid R1R2C=N+(−O−)−OH, a tautomeric form of a nitro compound. Just as aldehydes and ketones can exist in equilibrium with their enol tautomer, nitro compounds exist in equilibrium with their nitronate tautomer under basic conditions. In practice they are formed by the deprotonation of the α-carbon, the pKa of which is typically around 17.

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