oxonium ylide
oxonium ylide
Any oxygen ylide that is a compound having the structure R<small><sub>2</sub></small>O<small><sup>+</small></sup>‒C<small><sup>−</small></sup>‒R<small><sub>2</sub></small>. 2. Any of the class of 1,3-dipolar compounds of general structure R<small><sub>2</sub></small>C=O<small><sup>+</small></sup>‒Y<small><sup>−</small></sup>, comprising carbonyl imides, carbonyl oxides and carbonyl ylides.