Ethynyl group

In organic chemistry, an ethynyl group is a functional group with the formula −C≡CH, representing an acetylene molecule with one fewer hydrogen atom.

Ethynyl group (HC≡C–), also designated as an acetylenic group (from acetylene), is referred to in IUPAC chemical nomenclature with the -yne suffix. It is sometimes designated as ethinyl in compounds such as ethinylestradiol and ethisterone (ethinyltestosterone). See main page alkynes.

See also

Ethynylation
Ethynyl radical
Propynyl (H₃C–C≡C–R, 1-propynyl group; or HC≡C–CH₂–R, 2-propynyl group, Propargyl)

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