English

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Etymology

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From butyne +‎ -yl.

Noun

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butynyl (plural butynyls)

  1. (organic chemistry) Either of three isomeric univalent radicals (C4H5-) derived from the two isomers of butyne (C4H6)

Usage notes

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Another univalent radical derived from 1-butyne is not a butynyl, unlike 1-butynyl and 3-butynyl, but a methylpropynyl.

Derived terms

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