different between butenyl vs butynyl

English

butenyl (plural butenyls)

(organic chemistry) Any of several isomeric univalent radicals derived from butene; but especially crotyl

butyne +? -yl

butynyl (plural butynyls)

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

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

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