It corresponds to dibenzo-γ-pyrone and is also called 9-xanthenone. It is a white needle crystal with a melting point of 174°C and a boiling point of 350°C (730mmHg). It is insoluble in water, but is soluble in benzene and chloroform. Xanthone itself does not occur in nature, but is found as an oxy derivative in plants of the Gentianaceae family such as gentian, and as a hydroxy derivative in mango fruit. When concentrated sulfuric acid is added, it becomes a yellow solution that emits pale blue fluorescence. It is synthesized by heating phenyl salicylate or by condensation of salicylic acid and acetic anhydride. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
ジベンゾ‐γ‐ピロンに相当し,9‐キサンテノンともいう。白色針状晶で融点174℃,沸点350℃(730mmHg)。水に不溶だが,ベンゼン,クロロホルムなどにはよく溶ける。キサントン自身は天然には存在しないが,ゲンチシンなどリンドウ科の植物にオキシ誘導体として,またマンゴーの果実などにヒドロキシ誘導体として含まれる。濃硫酸を加えると淡青色の蛍光を発する黄色溶液となる。サリチル酸フェニルの加熱またはサリチル酸と無水酢酸の縮合によって合成される。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
>>: Xanthoprotein reaction - Xanthoprotein reaction
A type of aquatic plant that lives sessile with it...
…After returning from Italy in 1719, he designed ...
A tragedy by the ancient Greek tragedian Euripide...
A communication method or device that converts ch...
When stress acts on an object, it is called ruptur...
Also known as jute or tunaso. A fiber crop believe...
Since the Earth revolves around the Sun in an elli...
… [Takabayashi Masatoshi]. … *Some of the termino...
Under the ancient Ritsuryo system, uncultivated l...
A luminous bullet that is fired from a cannon, ro...
…In many cases, economic variables, including inc...
The international order established in Europe as ...
...The basic instruments that accompany the hula ...
A large conglomerate centered on the chemical ind...
…It was once the center of the British Empire, an...