2-methyl-1-butene

Structural formula
General
Surname	2-methyl-1-butene
Molecular formula	C 5 H 10
Brief description	colorless liquid with an unpleasant odor
External identifiers / databases
EC number	209-250-7
ECHA InfoCard	100.008.410
PubChem	11240
Wikidata	Q27147526
properties
Molar mass	70.13 g mol −1
Physical state	liquid
density	0.65 g cm −3
Melting point	−137 ° C
boiling point	31 ° C
Vapor pressure	672 hPa (20 ° C); 968 hPa (30 ° C); 1360 hPa (40 ° C); 1860 hPa (50 ° C);
solubility	practically insoluble in water; soluble in ether, ethanol and benzene;
Refractive index	1.3740 (20 ° C)
safety instructions
H and P phrases	H: 224-304
	P: 210-301 + 310-331
	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

2-methyl-1-butene is a chemical compound from the group of aliphatic , unsaturated hydrocarbons .

Extraction and presentation

2-Methyl-1-butene can be obtained by catalytic cracking or steam cracking of petroleum with subsequent isolation of the C5 fraction and extraction with cold aqueous sulfuric acid.

The compound may also by dehydration of 2-methyl-2-butanol with an acidic ion exchanger or dehydrohalogenation of 2-bromo-2-methylbutane to 2-methyl-1-butene and 2-methyl-2-butene are shown.

properties

2-Methyl-1-butene is an extremely flammable, volatile, colorless liquid with an unpleasant odor that is practically insoluble in water.

use

2-Methyl-1-butene is used as a solvent in organic syntheses. It is also used in the manufacture of pinacolone , flavor enhancers , spices, crop protection products, and tertiary amylphenol . It also serves as a photosensitive material and a concrete dispersant. It is also used as a fuel additive.

safety instructions

The vapors of 2-methyl-1-butene can form an explosive mixture with air ( flash point −37 ° C). The lower explosion limit is 1.4% by volume.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ Entry on 2-methyl-1-butene in the GESTIS substance database of the IFA , accessed on September 29, 2019(JavaScript required) .
↑ ^a ^b ^c data sheet 2-methyl-1-butene, 98% from AlfaAesar, accessed on August 9, 2018 ( PDF )(JavaScript required) .
↑ Entry on 2-methyl-1-butene in the Hazardous Substances Data Bank , accessed on August 9, 2018.
↑ ioc-praktikum.de: elimination reactions , accessed on August 9, 2018
^ Robert J. Ouellette, J. David Rawn: Organic Chemistry Structure, Mechanism, and Synthesis . Elsevier, 2014, ISBN 978-0-12-801082-2 , pp. 1023 ( limited preview in Google Book search).

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ Entry on 2-methyl-1-butene in the GESTIS substance database of the IFA , accessed on September 29, 2019(JavaScript required) .

[Alfa-2] ta sheet 2-methyl-1-butene, 98% from AlfaAesar, accessed on August 9, 2018 ( PDF )(JavaScript required) .

[HSDB-3] Entry on 2-methyl-1-butene in the Hazardous Substances Data Bank , accessed on August 9, 2018.

[ioc-praktikum.de-4] -praktikum.de: elimination reactions , accessed on August 9, 2018

[Robert_J._Ouellette,_J._David_Rawn-5] Robert J. Ouellette, J. David Rawn: Organic Chemistry Structure, Mechanism, and Synthesis . Elsevier, 2014, ISBN 978-0-12-801082-2 , pp. 1023 ( limited preview in Google Book search).