Alkyne

H
 
 −
 
 C
 
 ≡
 
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 −
 
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 {\displaystyle {\ce {H-C#C}}{\ce {-H}}}

<a href="/facts/Acetylene/yaDh6cmJ">Acetylene</a>

 
 
 
 
 H
 
 −
 
 C
 
 ≡
 
 C
 
 
 −
 
 
 
 
 C
 
 
 |
 
 
 
 H
 
 
 
 
 
 
 
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 |
 
 
 
 
 
 
 −
 
 H
 
 
 
 {\displaystyle {\ce {H-C#C}}{-}{\ce {\overset {\displaystyle {H} \atop |}{\underset {| \atop \displaystyle {H}}{C}}}}{\ce {-H}}}

<a href="/facts/Propyne/GJpDzkBj">Propyne</a>

 
 
 
 
 H
 
 −
 
 C
 
 ≡
 
 C
 
 
 −
 
 
 
 
 C
 
 
 |
 
 
 
 H
 
 
 
 
 
 
 
 H
 
 
 
 |
 
 
 
 
 
 −
 
 
 
 
 C
 
 
 |
 
 
 
 H
 
 
 
 
 
 
 
 H
 
 
 
 |
 
 
 
 
 
 
 −
 
 H
 
 
 
 {\displaystyle {\ce {H-C#C}}{-}{\ce {\overset {\displaystyle {H} \atop |}{\underset {| \atop \displaystyle {H}}{C}}}}{-}{\ce {\overset {\displaystyle {H} \atop |}{\underset {| \atop \displaystyle {H}}{C}}}}{\ce {-H}}}

<a href="/facts/1-Butyne/44HXrY9W">1-Butyne</a>

In <a href="/facts/Organic_chemistry/djxhxaNg">organic chemistry</a>, an alkyne is an <a href="/facts/Saturated_and_unsaturated_compounds/tde2C216">unsaturated</a> <a href="/facts/Hydrocarbon/Dcg95Ju5">hydrocarbon</a> containing at least one <a href="/facts/Carbon/ukrgQexo">carbon</a>—carbon <a href="/facts/Triple_bond/poDWRayX">triple bond</a>. The simplest <a href="/facts/Open-chain_compound/as8uvxjG">acyclic</a> alkynes with only one triple bond and no other <a href="/facts/Functional_group/GXkSPsjM">functional groups</a> form a <a href="/facts/Homologous_series/7PKCuvzm">homologous series</a> with the general chemical formula CnH2n−2. Alkynes are traditionally known as acetylenes, although the name acetylene also refers specifically to C2H2, known formally as <a href="/facts/Ethyne/yaDh6cmJ">ethyne</a> using <a href="/facts/IUPAC_nomenclature_of_organic_chemistry/ElygYu14">IUPAC nomenclature</a>. Like other hydrocarbons, alkynes are generally <a href="/facts/Hydrophobic/Ifya0CXQ">hydrophobic</a>.

Alkyne open-in-new

Alkyne