Ethynylbenzene

Title: Ethynylbenzene
CAS Registry Number: 536-74-3
Additional Names: Phenylacetylene
Molecular Formula: C8H6
Molecular Weight: 102.13
Percent Composition: C 94.08%, H 5.92%
Line Formula: C6H5CºCH
Literature References: Prepd by dropping b-bromostyrene on molten potassium hydroxide and distilling: Hessler, Org. Synth. 2, 67 (1922).
Properties: Liquid. d420 0.9300. mp -44.8°. bp760 142.4°; bp90 75°; bp15 39°. nD20 1.5489. Insol in water; miscible with alcohol, ether, other organic solvents.
Melting point: mp -44.8°
Boiling point: bp760 142.4°; bp90 75°; bp15 39°
Index of refraction: nD20 1.5489
Density: d420 0.9300
Etidocaine Etidronic Acid Etifelmin Etifoxine Etilefrin

Phenylacetylene
Phenylacetylene
Phenylacetylene-3D-balls.png
Identifiers
CAS number 536-74-3 YesY
PubChem 10821
ChemSpider 10364 YesY
ChEMBL CHEMBL234833 YesY
Jmol-3D images Image 1
Properties
Molecular formula C8H6
Molar mass 102.133 g/mol
Density 0.93 g/cm³
Melting point –45 °C
Boiling point 142-144 °C
Acidity (pKa) 28.8
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Phenylacetylene is an alkyne hydrocarbon containing a phenyl group. It exists as a colorless, viscous liquid. In research, it is sometimes used as an analog for acetylene; being a liquid, it is easier to handle than acetylene gas.