In organic chemistry, an ethynyl group is a functional group with the formula −C≡CH. It is the acetylene molecule with one fewer hydrogen atom. The name is also used for any compound containing that group, namely R−C≡CH where R is any other group of atoms.
- Ethynyl group (HC≡C–), also designated as acetylenic group (from acetylene), and referred to in IUPAC chemical nomenclature as -yne suffix. Also sometimes designed as ethinyl in compounds (ethinylestradiol, ethisterone (ethinyltestosterone)). See main page alkynes.
- Ethynyl radical (HC≡C·), the compound found in interstellar medium, and transiently on earth during chemical reactions.
- Ethynyl carbanion acetylide (HC≡C−)
See also
- Ethynylation
- Propynyl ( H3C–C≡C–R, 1-propynyl group; or HC≡C–CH2–R, 2-propynyl group, Propargyl)
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