Alkynes
| Formula / Notation | CₙH₂ₙ₋₂ (acyclic); R-C≡C-R' (general) |
|---|---|
| Also Known As | Alkynes; alkyne hydrocarbons; acetylenic compounds; CₙH₂ₙ₋₂ series; ethyne (acetylene) |
What is Alkynes?
Alkynes are unsaturated hydrocarbons containing at least one carbon–carbon triple bond (C≡C). The general formula for acyclic alkynes is CₙH₂ₙ₋₂. The simplest alkyne is ethyne (acetylene, HC≡CH). Alkynes are more reactive than alkenes and alkanes due to the triple bond. Terminal alkynes (with ≡C–H) are weakly acidic.
Formula & Notation
Other Names / Synonyms: Alkynes; alkyne hydrocarbons; acetylenic compounds; CₙH₂ₙ₋₂ series; ethyne (acetylene)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Alkynes are unsaturated hydrocarbons containing at least one carbon–carbon triple bond (C≡C). The general formula for acyclic alkynes is CₙH₂ₙ₋₂. The simplest alkyne is ethyne (acetylene, HC≡CH). Alkynes are more reactive than alkenes and alkanes due to the triple bond. Terminal alkynes (with ≡C–H) are weakly acidic.
Acetylene (ethyne) for oxy-acetylene welding and cutting; chemical synthesis starting materials; organic synthesis (Sonogashira coupling, Glaser coupling); polymerisation to polyacetylene (conducting polymer); synthesis of aldehydes, ketones, and other intermediates
Acetylene is highly flammable and can form explosive mixtures with air. Acetylene cylinders must never be laid on their side. Metal acetylides (copper, silver) formed in impure systems are shock-sensitive explosives. Terminal alkynes are mildly acidic and may irritate skin.
The formula or notation for Alkynes is: CₙH₂ₙ₋₂ (acyclic); R-C≡C-R' (general)