Pentyne may refer to:

2-Pentyne (ethyl methyl acetylene)
1-Pentyne (propylacetylene)

v t e Alkynes
Ethyne (C₂H₂) Propyne (C₃H₄) Butyne (C₄H₆) 1 2 Pentyne (C₅H₈) 1 2 Hexyne (C₆H₁₀) 1 2 3 Heptyne (C₇H₁₂) Octyne (C₈H₁₄) 2 4 Nonyne (C₉H₁₆) Decyne (C₁₀H₁₈) 1 5
Preparations	Cracking Dehydrogenation of alkane, alkene Alkylation of alkynyl anion Dehydrohalogenation of dihaloalkane Fritsch–Buttenberg–Wiechell rearrangement Corey–Fuchs reaction Seyferth–Gilbert homologation
Reactions	Deprotonation Hydrogenation Halogenation Hydration Hydroboration Hydrohalogenation Alkynylation Thiol-yne reaction Alkyne trimerisation Diels–Alder reaction Pauson–Khand reaction Azide-alkyne Huisgen cycloaddition Sonogashira coupling Cadiot–Chodkiewicz coupling Glaser coupling Favorskii reaction

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