Alkynes are hydrocarbons that have at least one triple bond between carbon atoms. The alkynes are traditionally known as acetylenes, though the name acetylene is also used to refer specifically to the simplest member of the series, known officially as ethyne.
Unlike an alkane an alkyne is unstable and very reactive. This gives rise to the intense heat of the acetylene flame used in welding.
The simplest alkyne is ethyne (acetylene):
- * Pyrone Diels-Alder → aromatic species
- Alkyne-azide reaction → Triazoles
- enediynes (alkyne - alkene - alkyne) → aromatics (Bergman cyclization)
- terminal alkyne + strong base → anion of terminal alkyne
- alkoxide + aqueous acid → hydroxyalkyne
- terminal alkyne + dialkylborane + hydrogen peroxide → aldehyde
Last updated: 08-16-2005 19:29:29