Xanthone

• IUPAC: 9H- xanthene -9-one
• Dibenzo- γ -pyrone
• 9 -oxo- xanthene

Colorless needles

Fixed

174-176 ° C

351 ° C

• Insoluble in cold water
• Slightly soluble in hot water, and petroleum ether
• Soluble in ethanol, diethyl ether, chloroform, benzene, and in concentrated sulfuric acid

Risk

Template: Infobox chemical / molecular formula search available

Xanthone (also xanthene -9-one or dibenzo- γ -pyrone ) is a heterocyclic chemical compound belonging to the ethers and ketones and is named after the substance group of xanthones for yourself., The reduction product xanthene forms the base body of the plant xanthene dyes.

Occurrence and representation

Xanthone itself does not occur in nature, but about 200 of its derivatives such as Euxanthon, Corymbiferin and gentisin. The representation of xanthone by distillation of phenyl salicylate.

Properties and Uses

Xanthone forms colorless, slightly sublimatable needles, melting 174-176 ° C and boil at about 351 ° C. It is freely soluble in ethanol, ether, chloroform and benzene, but insoluble in water. In concentrated sulfuric acid, the compound dissolves with a yellow color to a liquid with an intensely bright blue fluorescence. Under reductive conditions, xanthone can be converted into xanthene and Xanthydrol, by the action of Grignard compounds are formed Xanthyliumsalze. The only known use of xanthone is the use as a specific insecticide, which acts mainly on the larvae of moths as so-called larvicide.