2,6-naphthalenedicarboxylic acid
Structural formula | ||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
General | ||||||||||||||||||||||
Surname | 2,6-naphthalenedicarboxylic acid | |||||||||||||||||||||
other names |
Naphthalene-2,6-dicarboxylic acid |
|||||||||||||||||||||
Molecular formula | C 12 H 8 O 4 | |||||||||||||||||||||
Brief description |
white odorless solid |
|||||||||||||||||||||
External identifiers / databases | ||||||||||||||||||||||
|
||||||||||||||||||||||
properties | ||||||||||||||||||||||
Molar mass | 216.19 g mol −1 | |||||||||||||||||||||
Physical state |
firmly |
|||||||||||||||||||||
Melting point |
> 300 ° C |
|||||||||||||||||||||
solubility |
|
|||||||||||||||||||||
safety instructions | ||||||||||||||||||||||
|
||||||||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
2,6-Naphthalenedicarboxylic acid is a chemical compound from the group of carboxylic acids .
Extraction and presentation
Most of the 2,6-naphthalenedicarboxylic acid synthesis processes developed to date are based on the catalytic oxidation of alkylnaphthalenes. However, the homogeneous catalytic oxidative carbonylation of naphthalene in palladium salt solutions in the presence of a reoxidant is better . The direct introduction of a carbonyl group into the aromatic ring in combination with the conversion of naphthalenecarboxylic acid derivatives into 2,6-NDA is a route to a few, highly selective 2,6-NDA synthesis processes.
properties
2,6-naphthalenedicarboxylic acid is a white, odorless solid that is practically insoluble in water.
use
2,6-Naphthalenedicarboxylic acid is used as an intermediate in the manufacture of plastics ( polyethylene naphthalate (PEN) and polyethylene phthalate (PET) polymers and copolymers).
Individual evidence
- ↑ a b c Data sheet Naphthalene-2,6-dicarboxylic acid, 98 +% from AlfaAesar, accessed on January 3, 2019 ( PDF )(JavaScript required) .
- ↑ a b c d data sheet 2,6-Naphthalenedicarboxylic acid, 99% from Sigma-Aldrich , accessed on January 3, 2019 ( PDF ).
- ↑ David R. Lide: CRC Handbook of Chemistry and Physics A Ready-reference Book of Chemical and Physical Data . CRC Press, 1995, ISBN 978-0-8493-0595-5 , pp. 418 ( limited preview in Google Book search).
- ↑ AR Elman: Synthesis methods for 2,6-naphthalenedicarboxylic acid. In: Catalysis in Industry. 1, 2009, p. 184, doi : 10.1134 / S2070050409030039 .
- ↑ National Industrial Chemicals Notification and Assessment Scheme (NICNAS): 2,6-Naphthalenedicarboxylic acid , April 1997.