1,2 benzoquinone
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | 1,2 benzoquinone | |||||||||||||||
other names |
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Molecular formula | C 6 H 4 O 2 | |||||||||||||||
Brief description |
odorless red solid |
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properties | ||||||||||||||||
Molar mass | 108.10 g mol −1 | |||||||||||||||
Physical state |
firmly |
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Melting point |
60–70 ° C (decomposition) |
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solubility |
soluble in benzene , ethanol and diethyl ether |
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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 . |
1,2-Benzoquinone is a chemical compound from the group of ketones and quinones . It is isomeric to 1,4-benzoquinone .
Occurrence
1,2-Benzoquinone is a precursor to melanin .
Extraction and presentation
1,2-Benzoquinone can be obtained by oxidizing catechol in air or by ortho-oxidizing phenol .
properties
1,2-Benzoquinone is an unstable, odorless red solid.
Individual evidence
- ^ A b c d Mary Eagleson: Concise Encyclopedia Chemistry . Walter de Gruyter, 1994, ISBN 3-11-011451-8 , p. 123 ( limited preview in Google Book search).
- ↑ harmonized classification for this substance . A labeling of 1,2-benzoquinone in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), which was accessed on November 5, 2019, is reproduced from a self-classification by the distributor . There is not yet a
- ↑ Maurice R. Marshall, Jeongmok Kim and Cheng-I Wei: Enzymatic Browning in Fruits, Vegetables and Seafoods ( Memento of February 9, 2014 in the Internet Archive ), Section 2.3.2.
- ↑ a b Magdziak, D., Rodriguez, AA; Van De Water, RW; Pettus, TRR: Regioselective oxidation of phenols to o-quinones with o-iodoxybenzoic acid (IBX) . In: Org. Lett. . 4, No. 2, 2002, pp. 285-288. doi : 10.1021 / ol017068j . PMID 11796071 . PMC 1557836 (free full text).
- ↑ Chanda Parulekar and Suneela Mavinkurve (2006), "Formation of ortho- benzoquinone from sodium benzoate by Pseudomonas mendocina P 2 d". Indian Journal of Experimental Biology, volume 44, pp. 157-162. Online version (PDF; 252 kB) Retrieved on February 4, 2012 (English).