carbonyl ylide
carbonyl ylide
A 1,3-dipolar compound having the structure: R<small><sub>2</sub></small>C=O<small><sup>+</small></sup>‒C<small><sup>−</small></sup>R<small><sub>2</sub></small> ↔ R<small><sub>2</sub></small>C<small><sup>+</small></sup>‒O‒C<small><sup>−</small></sup>R<small><sub>2</sub></small>.