Enolate anion
An enolate anion is an anion derived by loss of a proton from the alpha carbon of a carbonyl group; it is the anion of an enol.
For instance, a base abstracts one proton from acetone to form enolate anion.
The enolate anion is stabilised by resonance and therefore the alpha hydrogen is acidic.
See also
Categories: Chemistry stubs | Organic chemistry