2-hexyne
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| General | ||||||||||||||||
| Surname | 2-hexyne | |||||||||||||||
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| Molecular formula | C 6 H 10 | |||||||||||||||
| Brief description |
colorless liquid |
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| properties | ||||||||||||||||
| Molar mass | 82.14 g mol −1 | |||||||||||||||
| Physical state |
liquid |
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| density |
0.7315 g cm −3 (20 ° C) |
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| Melting point |
−89.6 ° C |
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| boiling point |
84.5 ° C |
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| solubility |
almost insoluble in water, miscible with ethanol and diethyl ether , soluble in benzene , chloroform and petroleum ether |
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| Refractive index |
1.4138 (20 ° C) |
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C | ||||||||||||||||
2-Hexyne is a chemical compound from the alkynes group and a constitutional isomer to 1-hexyne and 3-hexyne . It has the basic structure of hexane with a C≡C triple bond in the 2-position.
Extraction and presentation
2-hexyne can be prepared by a multistep synthesis of ethyne via the intermediate propyne by reaction with sodium amide and methyl bromide and 1-bromopropane as well as by alkylation of mono- and di -sodium acetylides are obtained. All ethynes are also formed during the pyrolysis of hard coal .
properties
2-hexyne is a colorless, flammable liquid that burns with a very sooty flame. It is insoluble in water, but easily soluble in ethanol and diethyl ether . 2-hexyne is a versatile synthetic building block.
Individual evidence
- ↑ a b c data sheet 2-hexyne (PDF) from Merck , accessed on March 6, 2011.
- ↑ a b c d e David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-284.
- ^ A. William Johnson: Essentials of Organic Chemistry , ISBN 978-0-76370432-2 , p. 242 ( limited preview in the Google book search).
- ↑ a b Wissenschaft-Online Lexika: Entry on "Hexine" in the Lexikon der Chemie. Retrieved March 9, 2011.
Web links
- Entry for 2-hexyne . In: P. J. Linstrom, W. G. Mallard (Eds.): NIST Chemistry WebBook, NIST Standard Reference Database Number 69 . National Institute of Standards and Technology , Gaithersburg MD .