alkylidynes
Carbenes
R
2
C
…
containing a univalent carbon atom, atom, e.g.
CH
3
CH
2
C
…
propylidyne
Source:
PAC, 1995,
67
, 1307
(Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995))
on page 1314