2-Pentyne
2-Pentyne, an organic compound, is an internal alkyne. It is an isomer of 1-pentyne, a terminal alkyne.
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1-Pentyne
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Names | |
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IUPAC name
Pent-2-yne | |
Other names
Ethylmethylacetylene, 1-Ethyl-2-methylacetylene propyl acetylene | |
Identifiers | |
3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.009.991 |
PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C5H8 | |
Molar mass | 68.12 |
Density | 0.71 g/mL |
Melting point | −109 °C (−164 °F; 164 K) |
Boiling point | 56 to 57 °C |
Hazards | |
Main hazards | Flammable Liquid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Infobox references | |
Synthesis
2-Pentyne can be synthesized by the rearrangement 1-pentyne in a solution of ethanolic potassium hydroxide or NaNH2/NH3.[1]
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References
- Victor von Richter and Hans Meerwein (1916). Organic Chemistry: Chemistry of the aliphatic series Vol. I: Smith's 3rd American Ed. Philadelphia: P. Blakiston's Sons & Co. p. 89.
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