- 関
- isobutyrate
WordNet
- street name for lysergic acid diethylamide (同)back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen
- any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
- having the characteristics of an acid; "an acid reaction"
PrepTutorEJDIC
- 酸性の / 酸味のある,すっぱい(sour) / (言葉・態度などが)厳しい,しんらつな / 酸 / すっぱいもの / 《俗》=LSD
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/01/20 14:36:59」(JST)
[Wiki en表示]
| Isobutyric acid[1] |
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Other names
Isobutyric acid
2-Methylpropionic acid
Isobutanoic acid
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| Identifiers |
| CAS number |
79-31-2 Y |
| ChemSpider |
6341 Y |
| UNII |
8LL210O1U0 Y |
| DrugBank |
DB04305 |
| KEGG |
C02632 Y |
| ChEBI |
CHEBI:16135 Y |
| ChEMBL |
CHEMBL108778 Y |
| Jmol-3D images |
Image 1 |
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InChI=1S/C4H8O2/c1-3(2)4(5)6/h3H,1-2H3,(H,5,6) Y
Key: KQNPFQTWMSNSAP-UHFFFAOYSA-N Y
InChI=1/C4H8O2/c1-3(2)4(5)6/h3H,1-2H3,(H,5,6)
Key: KQNPFQTWMSNSAP-UHFFFAOYAB
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| Properties |
| Molecular formula |
C4H8O2 |
| Molar mass |
88.11 g/mol |
| Density |
0.9697 g/cm3 at 0 °C |
| Melting point |
-47 °C, 226 K, -53 °F
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| Boiling point |
155 °C, 428 K, 311 °F
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| Acidity (pKa) |
4.86[2] |
Y (verify) (what is: Y/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
| Infobox references |
Isobutyric acid, also known as 2-methylpropanoic acid, is a carboxylic acid with structural formula (CH3)2-CH-COOH. It is found in the free state in carobs (Ceratonia siliqua) and in the root of Arnica dulcis, and as an ethyl ester in croton oil.
Isobutyric acid is an isomer of n-butyric acid; they have the same chemical formula C4H8 O2 but a different structure.
Production
Isobutyric acid may be artificially prepared by the hydrolysis of isobutyronitrile with alkalis, by the oxidation of isobutanol with potassium dichromate and sulfuric acid,[3] or by the action of sodium amalgam on methacrylic acid. It is a liquid of somewhat unpleasant smell, boiling at 155 °C. Its specific gravity is 0.9697 (0 °C). Heated with chromic acid solution to 140 °C, it gives carbon dioxide and acetone. Alkaline potassium permanganate oxidizes it to α-hydroxyisobutyric acid, (CH3)2-C(OH)-COOH. Its salts are more soluble in water than those of butyric acid.
Biological production
Isobutyric acid can also be manufactured commercially using engineered bacteria using a sugar feedstock.[4]
Isobutyric acid is a retained trivial name under the IUPAC rules.[5]
References
- ^ Merck Index, 11th Edition, 5039
- ^ Bjerrum, J., et al. Stability Constants, Chemical Society, London, 1958.
- ^ I. Pierre and E. Puchot (1873). "New Studies on Valerianic Acid and its Preparation on a Large Scale". Ann. de chim. et de phys. 28: 366.
- ^ "Biological pathways to produce methacrylate". http://www.license.umn.edu/Products/Biological-Pathways-Produce-Isobutyric-Acid-Using-Renewable-Resources__20110077.aspx.
- ^ Panico, R.; Powell, W. H.; Richer, J. C., eds. (1993). "Recommendation R-9.1". A Guide to IUPAC Nomenclature of Organic Compounds. IUPAC/Blackwell Science. ISBN 0-632-03488-2. http://www.acdlabs.com/iupac/nomenclature/.
This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press.
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Related Links
- [Isobutyric Acid] [79-31-2] | 価格や在庫、物性値などの詳細情報ページです。 ... ・川口の在庫は即日，つくばの在庫は2〜3日以内の出荷となります。・詳細につきましては，お手数ですが営業部までお問い合わせください。
- Sigma-Aldrich offers Sigma-I1754, Isobutyric acid for your research needs. Find product specific information including CAS, MSDS, protocols and references. ... Fermentation: Enzymes, Substrates and SCFA The influence of ...
★リンクテーブル★
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- 英
- isobutyric acid、isobutyrate
- 関
- イソ酪酸塩
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- 関
- isobutyric acid