|Molecular formula||C 9 H 4 Cl 6 O 4|
|External identifiers / databases|
|Molar mass||388.84 g mol −1|
239-242 ° C
|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.
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 .
- Environmental Health Criteria (EHC) for Chlorendic acid and anhydride , accessed June 20, 2018.
- 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 ).
- Entry on chlorendic acid in the Hazardous Substances Data Bank , accessed on June 12, 2018.