1-butyne

Structural formula
General
Surname	1-butyne
other names	But-1-in; Ethyl acetylene;
Molecular formula	C 4 H 6
Brief description	colorless gas with an odor similar to acetylene
External identifiers / databases
EC number	203-451-3
ECHA InfoCard	100.003.139
PubChem	7846
Wikidata	Q161597
properties
Molar mass	54.09 g mol −1
Physical state	gaseous
density	0.67 g cm −3 (liquid phase at boiling point); 2.34 g l −1 (gaseous, 15 ° C, 1000 hPa);
Melting point	−125.73 ° C
boiling point	8.07 ° C
Vapor pressure	1581 hPa (20 ° C)
solubility	practically insoluble in water; soluble in ethanol and diethyl ether ;
safety instructions
H and P phrases	H: 220-280
	P: 210-377-381-410 + 403
Thermodynamic properties
ΔH f 0	165.2 kJ / mol
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

1-Butyne is a hydrocarbon from the homologous series of alkynes and isomeric to 2-butyne .

Extraction and presentation

1-Butyne can be obtained by reacting ethyne with a haloethane (e.g. bromoethane ).

properties

1-Butyne is a highly flammable gas which forms explosive mixtures with air or oxygen over a wide range of concentrations. Due to its triple bond , 1-butyne is very reactive. So it will readily add halogens . 1-Butyne has a narcotic effect in higher concentrations.

It has a critical temperature of 190.6 ° C, a critical pressure of 48.6 bar, a critical density of 0.245 kg / l and a triple point temperature of −125.7 ° C.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Entry on 1-butyne in the GESTIS substance database of the IFA , accessed on January 9, 2019(JavaScript required) .
↑ Entry on 1-butyne. In: Römpp Online . Georg Thieme Verlag, accessed on November 12, 2014.
↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Standard Thermodynamic Properties of Chemical Substances, pp. 5-25.
↑ Paula Yurkanis Bruice: Organic Chemistry: Study compact . Pearson Deutschland GmbH, 2011, ISBN 978-3-86894-103-6 ( page 259 in the Google book search).

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Entry on 1-butyne in the GESTIS substance database of the IFA , accessed on January 9, 2019(JavaScript required) .

[2] Entry on 1-butyne. In: Römpp Online . Georg Thieme Verlag, accessed on November 12, 2014.

[CRC90_5_25-3] David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Standard Thermodynamic Properties of Chemical Substances, pp. 5-25.

[Bruice-4] Paula Yurkanis Bruice: Organic Chemistry: Study compact . Pearson Deutschland GmbH, 2011, ISBN 978-3-86894-103-6 ( page 259 in the Google book search).