Isocinchomeronic acid
| Structural formula | |||||||||||||||||||
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| General | |||||||||||||||||||
| Surname | Isocinchomeronic acid | ||||||||||||||||||
| other names |
2,5-pyridinedicarboxylic acid |
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| Molecular formula | C 7 H 5 NO 4 | ||||||||||||||||||
| Brief description |
white to yellow odorless solid |
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| properties | |||||||||||||||||||
| Molar mass | 167.12 g mol −1 | ||||||||||||||||||
| Physical state |
firmly |
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| Melting point |
242–247 ° C (decomposition) |
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| solubility |
sparingly soluble in water (1.2 g l −1 at 25 ° 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 . | |||||||||||||||||||
Isocinchomeronic acid is a chemical compound from the group of pyridinedicarboxylic acids .
Extraction and presentation
Isocinchomeronic acid is produced by the oxidation of coal tar butidine and of aldehyde collidine or by heating carboisocinchomeronic acid .
The compound can also be prepared from 3,4-dihydroxybenzoic acid .
properties
Isocinchomeronic acid is a white to yellow odorless solid that is practically insoluble in cold water and diethyl ether. It is sparingly soluble in ethanol . If heated above 255 ° C, it decomposes into carbonic acid and nicotinic acid .
use
Isocinchomeronic acid can be used to make polyesters .
Individual evidence
- ↑ a b Entry on 2,5-pyridinedicarboxylic acid at TCI Europe, accessed on January 2, 2019.
- ↑ a b c d data sheet isocinchomeronic acid (PDF) from Merck , accessed on January 2, 2018.
- ↑ a b c d data sheet 2,5-pyridinedicarboxylic acid, 98% from Sigma-Aldrich , accessed on January 2, 2019 ( PDF ).
- ↑ a b Richard Wolffenstein: The plant alkaloids . Springer-Verlag, 2013, ISBN 978-3-642-92449-1 , pp. 68 ( limited preview in Google Book search).
- ↑ L. Weiss: Synthesis of Isocinchomeronsäure. In: Reports of the German Chemical Society. 19, 1886, p. 1305, doi : 10.1002 / cber.188601901290 .
- ↑ Google Patents: WO2016202875A1 - Process for the preparation of 2,4- or 2,5-pyridinedicarboxylic acid and copolymers derived therefrom - Google Patents , accessed on January 2, 2019
- ↑ George C. East, Venu GR Gudiguntla: The synthesis and characterization of polyesters based on 2,5-pyridinedicarboxylic acid. In: Macromolecular Chemistry and Physics. 195, p. 1851, doi : 10.1002 / macp.1994.021950532 .