1. of, relating to, or containing the ethynyl group (HC≡C−), a functional group consisting of a carbon-carbon triple bond with a hydrogen atom
Usage: chemistry; technical

1. the univalent radical HC≡C− derived from acetylene, used in organic chemistry
Usage: chemistry; technical

Examples

• The ethynyl group is commonly used in synthetic organic chemistry.
• Ethynyl-substituted aromatic compounds have unique reactivity.
• The researcher synthesized an ethynyl derivative for the pharmaceutical study.
• Ethynyl radicals can participate in coupling reactions.
• The molecule contains two ethynyl functional groups.