Nitronate

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General chemical structure of a nitronate

A nitronate (

pKa
of which is typically around 17.

Nitronates are formed as intermediates in the

negative charge on the α-carbon and a double bond between the nitrogen and one of the oxygens, and another resonance structure with a double bond between the nitrogen and the α-carbon, and single bonds
between the nitrogen and the oxygens.

References