oxonium ylides

  1. Compounds having the structure R2O+–CR2.
    See: ylides
  2. A class of 1,3-dipolar compounds of general structure R2C=O+–Y , comprising carbonyl imides, carbonyl oxides and carbonyl ylides.
PAC, 1995, 67, 1307 (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1355