https://doi.org/10.1351/goldbook.O04379
  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
    .
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1355 [Terms] [Paper]