Definition of butyne in English:

butyne

Pronunciation /ˈbjuːtʌɪn/

noun

(also butine)
Chemistry
  • Originally, each of four isomeric unsaturated hydrocarbons with chemical formula C₄ H₆; (in later use specifically) either of the two isomers which are alkynes, used in chemical synthesis.

    The two alkynes are "1-butyne" or "but-1-yne" (CH≡CCH₂CH₃) and "2-butyne" or "but-2-yne" (CH₃C≡CCH₃C); both are gases at room temperature. The other two isomers are buta-1-3-diene (CH₂=CHCH=CH₂) and buta-1-2-diene (CH₂=C=CHCH₃). These are no longer referred to as butynes.

Origin

Late 19th century. From but- + -ine, perhaps after butine.