3-methyl-3-penten-2-one
| Structural formula | |||||||||||||||||||
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| trans -3-methyl-3-penten-2-one | |||||||||||||||||||
| General | |||||||||||||||||||
| Surname | 3-methyl-3-penten-2-one | ||||||||||||||||||
| other names |
3-methylpent-3-en-2-one |
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| Molecular formula | C 6 H 10 O | ||||||||||||||||||
| Brief description |
colorless to brown liquid |
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| properties | |||||||||||||||||||
| Molar mass | 98.14 g mol −1 | ||||||||||||||||||
| Physical state |
liquid |
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| density |
0.875 g cm −3 |
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| Melting point |
−70 ° C |
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| boiling point |
138 ° C |
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| Refractive index |
1.4490 (20 ° C) |
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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 | |||||||||||||||||||
3-Methyl-3-penten-2-one is a chemical compound from the group of ketones . There are two isomers:
- cis -3-methyl-3-penten-2-one [synonym: ( Z ) -3-methyl-3-penten-2-one] and
- trans -3-methyl-3-penten-2-one [synonym: ( E ) -3-methyl-3-penten-2-one].
Extraction and presentation
The compound can be obtained by reacting acetaldehyde and methyl ethyl ketone using an acid catalyst .
properties
3-Methyl-3-penten-2-one is a colorless to brown liquid. The compound can form a dimer .
use
3-Methyl-3-penten-2-one is used as an intermediate in the production of other chemical compounds (for example, as a key intermediate in the synthesis of woody fragrances for perfume).
Individual evidence
- ↑ a b c d e f g h Entry on 3-methyl-3-penten-2-one in the GESTIS substance database of the IFA , accessed on January 12, 2019(JavaScript required) .
- ↑ a b c Data sheet 3-Methyl-3-penten-2-one, (E) + (Z), 95% from AlfaAesar, accessed on January 12, 2019 ( PDF )(JavaScript required) .
- ↑ a b International Flavors & Fragrances, Inc .: GREEN PROCESS FOR PRODUCING 3-METHYL-3-PENTENE-2-ONE , accessed January 12, 2019.
- ↑ Tatsuo Takeshima, Teruyasu Imaseki, Sachiko Ogata: The Dimerization of 3-Methyl-3-penten-2-one. In: Bulletin of the Chemical Society of Japan. 31, 1958, p. 4, doi : 10.1246 / bcsj.31.4 .