1,4,5,6,7,7-hexachloro-5-norbornene-2,3-dicarboxylic acid
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | 1,4,5,6,7,7-hexachloro-5-norbornene-2,3-dicarboxylic acid | |||||||||||||||
other names |
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Molecular formula | C 9 H 4 Cl 6 O 4 | |||||||||||||||
Brief description |
white solid |
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properties | ||||||||||||||||
Molar mass | 388.84 g mol −1 | |||||||||||||||
Physical state |
firmly |
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Melting point |
239-242 ° C |
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solubility | ||||||||||||||||
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 . |
1,4,5,6,7,7-hexachloro-5-norbornene-2,3-dicarboxylic acid is a chemical compound from the group of carboxylic acids and hexachloronorbornenes. The anhydride of the compound is 1,4,5,6,7,7-hexachloro-8,9,10-trinorborn-5-ene-2,3-dicarboxylic anhydride and structurally with chlorinated cyclodiene insecticides such as aldrin , dieldrin , endrin , isodrin , Endosulfan , chlordane and heptachlor related.
Extraction and presentation
1,4,5,6,7,7-hexachloro-5-norbornene-2,3-dicarboxylic acid can be obtained by a Diels-Alder reaction of hexachlorocyclopentadiene with maleic anhydride and subsequent hydrolysis of the anhydride formed.
properties
1,4,5,6,7,7-hexachloro-5-norbornene-2,3-dicarboxylic acid is a white crystalline solid which, when heated, begins to decompose to anhydride before the melting point is reached. The compound is very resistant to hydrolytic dechlorination, easily forms salts with a wide variety of metals. It forms esters when heated with or without azeotropic solvents (e.g. chlorobenzene ) and easily forms alkyl-type polyester resins by reaction with glycols and other polyols .
use
1,4,5,6,7,7-Hexachloro-5-norbornene-2,3-dicarboxylic acid is used as an intermediate for the production of polyester resins and as a flame retardant .
Individual evidence
- ↑ a b c d e Environmental Health Criteria (EHC) for Chlorendic acid and anhydride , accessed June 20, 2018.
- ↑ a b c d e data sheet 1,4,5,6,7,7-Hexachloro-5-norbornene-2,3-dicarboxylic acid, 99% from Sigma-Aldrich , accessed on June 20, 2018 ( PDF ).
- ↑ a b c d e Entry on chlorendic acid in the Hazardous Substances Data Bank , accessed on June 12, 2018.