A compound in which a sulfonic acid group (sulfo group) -SO 2 -OH is substituted on the benzene ring of toluene. There are three positional isomers (above formula): o- , m- , and p- . When toluene is reacted with fuming sulfuric acid at 75°C, sulfonation occurs easily, resulting in an isomeric mixture of 19% o -isomer, 6% m -isomer, and 75% p -isomer. p -Toluenesulfonic acid usually has one or four molecules of crystal water, and the monohydrate has a melting point of 105-106°C. It is easily soluble in water, alcohol, and ether. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
トルエンのベンゼン環にスルホン酸基(スルホ基)-SO2-OHが置換した化合物。o‐,m‐,p‐の3種の位置異性体(上式)が存在する。75℃でトルエンに発煙硫酸を反応させると容易にスルホン化が起こり,o‐体19%,m‐体6%,p‐体75%の異性体混合物が得られる。p‐トルエンスルホン酸は通常1分子または4分子の結晶水をもち,1水和物は105~106℃の融点を示す。水によく溶け,アルコール,エーテルにも可溶。
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 |
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