3-Methyl-1-buten - 3-Methyl-1-buten

Structural formula
Structural formula of 3-methyl-1-butene
General
Name 3-Methyl-1-buten
other names
  • 3-Methylbut-1-en
  • Isopropylethylen
Sum formula C5H10
Brief description

colorless gas [1]

External identifiers / databases
CAS number 563-45-1
EC number 209-249-1
ECHA-InfoCard 100.008.409
PubChem 11239
ChemSpider 10765
Wikidata Q27147525
characteristics
Molar mass 70.13 g · mol −1
Physical state

liquid or gaseous [1]

density

0,63 g·cm−3[1]

Melting point

−168 °C[1]

boiling point

20 °C[1]

Vapor pressure

1150 hPa (20 °C)[1]

solubility
  • very sparingly soluble in water (0.13 g l −1 at 25 ° C) [1]
  • miscible with diethyl ether and ethanol [2]
safety instructions
GHS hazard labeling [1]
02 - Highly / extremely flammable 07 - Warning 08 - Dangerous to health

danger

H and P phrases H: 224​‐​304​‐​315​‐​319​‐​335
P: 210​‐​261​‐​301+310​‐​305+351+338​‐​331 [1]
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

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

Extraction and presentation

3-Methyl-1-butene can be obtained from the cracking reaction of petroleum . [3] It is also possible to display 3-methyl-1-butanol over an aluminum-containing oxide. [4]

characteristics

3-methyl-1-butene is an extremely flammable, highly volatile, colorless gas that is very sparingly soluble in water. It has a critical temperature of 176.9 ° C, a critical pressure of 35.2 bar and a critical density of 0.234 g / cm³. [1]

use

3-Methyl-1-butene is used as for the production of other chemical compounds (for example (-) - Linderol A [5] or polymers [6] ). [7]

safety instructions

The vapors of 3-methyl-1-butene can form an explosive mixture with air ( flash point −58 ° C, ignition temperature 365 ° C). [1]

Individual evidence

  1. a b c d e f g h i j k Entry on 3-methyl-1-butene in the GESTIS substance database of the IFA , accessed on January 12, 2019(JavaScript required) .
  2. David R. Lide: CRC Handbook of Chemistry and Physics A Ready-reference Book of Chemical and Physical Data. CRC Press, 1995, ISBN 978-0-8493-0595-5, S. 374 ( limited preview in Google Book search).
  3. Entry on 3-methyl-1-butene in the Hazardous Substances Data Bank , accessed January 12, 2019.
  4. Google Patents: US20120136190A1 - Production of 3-methylbut-1-en by means of dehydration of 3-methylbutane-1-ol - Google Patents, abgerufen am 12. Januar 2019
  5. M. Yamashita, N. D. Yadav, T. Sawaki, I. Takao, I. Kawasaki, Y. Sugimoto, A. Miyatake, K. Murai, A. Takahara, A. Kurume, S. Ohta: Asymmetric total synthesis of (-)-Linderol A. In: The Journal of organic chemistry. Band 72, Nummer 15, Juli 2007, S. 5697–5703, doi:10.1021/jo070682+, PMID 17579456.
  6. Google Patents: US3457320A - Production of 3-methyl-1-butene - Google Patents, abgerufen am 12. Januar 2019
  7. Data sheet 3-methyl-1-butene, 95% from Sigma-Aldrich , accessed on January 12, 2019 ( PDF ).