Phenylacetylene
A terminal alkyne attached directly to a phenyl group.
- Formula
- C8H6
- Molar mass
- 102.13 g/mol
- Also known as
- ethynylbenzene, Phenylethyne, Benzene, ethynyl-, 1-Phenylethyne, Phenylacetylide, phenyl-acetylene
Overview
A terminal alkyne attached directly to a phenyl group.
The molecule combines an aromatic ring with a separate carbon–carbon triple bond. Its terminal alkyne hydrogen retains the characteristic strong-base acidity of that group. Hydration at the alkyne can give acetophenone without treating the ring as three independent alkenes.
Identifiers
- Formula
- C8H6
- Molar mass
- 102.13 g/mol
- Also known as
- ethynylbenzene, Phenylethyne, Benzene, ethynyl-, 1-Phenylethyne, Phenylacetylide, phenyl-acetylene
Chemical identifiers
- SMILES
- C#CC1=CC=CC=C1
- InChI
- InChI=1S/C8H6/c1-2-8-6-4-3-5-7-8/h1,3-7H
- PubChem CID
- 10821
Properties
- Melting Point
- -45 °C
- Boiling Point
- 142 °C @760 [mm Hg]
Data availability
Not published: Density, Solubility.
Related compounds
- Alkynes
Phenylacetylene is a specific member of the alkynes family.
References
- PubChem Compound Summary: Phenylacetylene (CID 10821)National Center for Biotechnology Information · PubChem
Identity, molecular formula, molecular weight and aliases retrieved via PUG REST on 2026-09-08.
- OpenStax Organic Chemistry: Alkyne acidity: formation of acetylide anionsJohn McMurry · OpenStax · 2023
Supports the qualitative structure and reactivity context; identity and numerical measurements retain their original references.
- OpenStax Organic Chemistry: Hydration of alkynesJohn McMurry · OpenStax · 2023
Supports the qualitative structure and reactivity context; identity and numerical measurements retain their original references.
- PAC Chemical Database, U.S. Department of Energy: Phenylacetylene — melting pointPAC Chemical Database, U.S. Department of Energy
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/10821#section=Melting-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred.
- PAC Chemical Database, U.S. Department of Energy: Phenylacetylene — boiling pointPAC Chemical Database, U.S. Department of Energy
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/10821#section=Boiling-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred.