2,3-dimethylbutadiene
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | 2,3-dimethylbutadiene | |||||||||||||||
other names |
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Molecular formula | C 6 H 10 | |||||||||||||||
Brief description |
highly flammable, volatile, liquid |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 82.15 g mol −1 | |||||||||||||||
Physical state |
liquid |
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density |
0.73 g cm −3 |
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Melting point |
−76 ° C |
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boiling point |
68 ° C |
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Vapor pressure |
358.6 hPa (37.7 ° C) |
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solubility |
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Refractive index |
1.438 (20 ° C) |
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safety instructions | ||||||||||||||||
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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 |
2,3-Dimethylbutadiene (more precisely 2,3-dimethyl-1,3-butadiene ) is a chemical compound from the group of aliphatic , unsaturated hydrocarbons and dienes .
Extraction and presentation
2,3-Dimethyl-1,3-butadiene can easily be obtained from pinacol by an acid-catalyzed dehydration reaction .
properties
2,3-Dimethyl-1,3-butadiene is a highly flammable, volatile liquid that is very sparingly soluble in water.
use
2,3-Dimethyl-1,3-butadiene is used to produce other chemical compounds (for example 1,3,6-triene derivatives) by Diels-Alder cycloaddition reactions and polymerization reactions (for example to methyl rubber ). She is also involved in the manufacture of synthetic rubber .
safety instructions
The vapors of 2,3-dimethyl-1,3-butadiene can form an explosive mixture with air ( flash point −1 ° C).
Individual evidence
- ↑ a b c d e f g h i j k Entry on 2,3-dimethyl-1,3-butadiene in the GESTIS substance database of the IFA , accessed on March 4, 2018(JavaScript required) .
- ↑ a b data sheet 2,3-dimethyl-1,3-butadiene, 98%, stab. with 100ppm BHT at AlfaAesar, accessed on March 4, 2018 ( PDF )(JavaScript required) .
- ↑ a b Data sheet 2,3-Dimethyl-1,3-butadiene, 98%, contains 100 ppm BHT as stabilizer from Sigma-Aldrich , accessed on March 4, 2018 ( PDF ).
- ↑ CFH Allen, Alan Bell, LW Newton, and ER Coburn: 2,3-Dimethyl-1,3-butadiene In: Organic Syntheses . 22, 1942, p. 39, doi : 10.15227 / orgsyn.022.0039 ; Coll. Vol. 3, 1955, p. 312 ( PDF ).