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the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > hydrocarbon radicals > named, by number of carbon atoms > two (3)
ethynyl1867

The unsaturated hydrocarbon radical —C≡CH, derived from ethyne (acetylene). Usually attributive.

acetenyl1870

= ethynyl, n. Frequently attributive. Originally as a formative element in the names of compounds, as acetenylbenzene.

ethanoyl1894

= acetyl, n. 2.

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