alkylidenes

https://doi.org/10.1351/goldbook.A00233
@C00806@ R2C: formed by mono or dialkyl substitution of @M03881@, H2C:, e.g. CH3CH2CH: propylidene.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1314 [Terms] [Paper]