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Naphthalenetetracarboxylic dianhydride : ウィキペディア英語版 | Naphthalenetetracarboxylic dianhydride
Napthalenetetracarboxylic dianhydride is an organic compound related to naphthalene. The compound is a beige solid. NTDAs are most commonly used as a precursor to naphthalenediimides (NDIs), a family of compound with many different uses.〔Bhosale, S.; Jani, C.; Langford, S. "Chemistry of Naphthalene Diimides" Chem. Soc. Rev., 2008, 37, 331-342. 〕 ==Synthesis and structure==
Naphthalene dianhydride is prepared by oxidation of pyrene. Typical oxidants are chromic acid and chlorine. The unsaturated tetrachloride hydrolyzes to enols that tautomerize to the bis-dione, which in turn can be oxidized to the tetracarboxylic acid.〔F. Röhrscheid "Carboxylic Acids, Aromatic" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2012. 〕
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