A chemical radical or group derived from ethyne, consisting of a carbon-carbon triple bond with one attachment point, used as a building block in organic synthesis.
From ethyne (the two-carbon triple-bonded hydrocarbon) + -yl (suffix indicating a radical or substituent group). Created as chemists needed names for reactive ethyne fragments.
Ethynyl groups are like molecular 'hooks'—chemists attach them to complex molecules, then use click chemistry to snap them onto other compounds with precision, revolutionizing how new drugs and materials are designed.
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