...A general term for compounds formed by the dehydration condensation of alcohols or phenols with organic and inorganic acids, and classified according to their constituents. The name ester originated in 1848 when German chemist L. Gmelin named ethyl acetate Essigäther (Essig (vinegar) + Äther). There are neutral esters and acidic esters of dibasic or higher acids. For example, there are two types of esters of sulfuric acid: R 2 SO 4 (neutral) and ROSO 3 H (acidic). ... *The following is a partial explanation of the term "equitable estoppel." Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…アルコールやフェノールが有機酸および無機酸と脱水縮合してできる化合物の総称で,その構成成分によって分類される。 1848年にドイツの化学者L.グメリンが酢酸エチルのことをEssigäther(Essig(酢)+Äther)と名づけたのがエステルの名のはじまりである。二塩基酸以上の酸のエステルには中性エステルと酸性エステルが存在する。たとえば,硫酸のエステルにR2SO4(中性)とROSO3H(酸性)の2種類がある。… ※「エクイティ上の禁反言」について言及している用語解説の一部を掲載しています。 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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