1-hexyne

Structural formula
General
Surname	1-hexyne
other names	Hex-1-in; n -butylethine; n -butylacetylene;
Molecular formula	C 6 H 10
Brief description	colorless liquid
External identifiers / databases
EC number	211-736-9
ECHA InfoCard	100.010.671
PubChem	12732
Wikidata	Q161638
properties
Molar mass	82.14 g mol −1
Physical state	liquid
density	0.7155 g cm −3 (25 ° C)
Melting point	−132 ° C
boiling point	71 ° C
Vapor pressure	337 hPa (37.7 ° C)
solubility	very bad in water (0.36 g / l at 25 ° C)
Refractive index	1.3989 (20 ° C)
safety instructions
H and P phrases	H: 225-304-315-319-335
	P: 210-261-301 + 310-305 + 351 + 338-331
	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

1-hexyne is a chemical compound from the alkynes group and a constitutional isomer to 2-hexyne and 3-hexyne . It has the basic structure of n-hexane with a CC triple bond in the 1-position.

Extraction and presentation

1-Hexyne can be obtained by reacting 1-hexene with bromine and then reacting the resulting 1,2-dibromohexane with sodium amide . The reaction of sodium acetylide with 1-bromobutane also gives 1-hexyne.

properties

1-Hexyne is a very volatile, highly flammable, colorless liquid at room temperature that boils at 71–72 ° C.

safety instructions

The vapors of 1-hexyne and air form an explosive mixture ( flash point −20 ° C, ignition temperature 263 ° C). Explosive salts are formed with heavy metal ions.

Individual evidence

↑ Data sheet 1-Hexyne (PDF) from Merck , accessed on December 11, 2011.
↑ ^a ^b ^c ^d 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 ^b ^c ^d ^e ^f ^g Entry on 1-hexyne in the GESTIS substance database of the IFA , accessed on April 19, 2018(JavaScript required) .
↑ William H. Brown, Christopher S. Foote, Brent L. Iverson, Eric V. Anslyn, Bruce M. Novak: Organic Chemistry . 2011, ISBN 978-0-8400-5498-2 ( pages 270 and 271 in the Google book search).

Web links

Entry for 1-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 .

[Merck-1] Data sheet 1-Hexyne (PDF) from Merck , accessed on December 11, 2011.

[CRC90_3_284-2] 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.

[GESTIS-3] ↑ ^a ^b ^c ^d ^e ^f ^g Entry on 1-hexyne in the GESTIS substance database of the IFA , accessed on April 19, 2018(JavaScript required) .

[orgch-4] William H. Brown, Christopher S. Foote, Brent L. Iverson, Eric V. Anslyn, Bruce M. Novak: Organic Chemistry . 2011, ISBN 978-0-8400-5498-2 ( pages 270 and 271 in the Google book search).