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|Section2= }} Orthoformic acid or methanetriol is a hypothetical compound with the formula HC(OH)3. In this molecule, the central carbon is bound to one hydrogen and three hydroxyl groups. Orthoformic acid has not been isolated to date, and is believed to be unstable, decomposing into water and formic acid.〔Böhm, S., Antipova, D. and Kuthan, J. (1996), "Study of methanetriol decomposition mechanisms". ''International Journal of Quantum Chemistry'', volume 60, pages 649–655. 〕 ==Esters== Methanetriol esters, known as orthoformates, are well known and commercially available.〔Peter P. T. Sah, Tsu Sheng Ma (1932), ""ESTERS OF ORTHOFORMIC ACID". ''J. Am. Chem. Soc.'', volume 54, issue 7, pages 2964–2966 〕〔H. W. Post (1943), "The Chemistry of the Aliphatic Orthoesters", Reinhold, 188 pages〕 Like acetals, they are stable towards bases but easily hydrolyzed in acidic conditions to the alcohol and an ester of formic acid. They are used are as mild dehydrating agent. Especially well known are trimethyl orthoformate, triethyl orthoformate, and triisopropyl orthoformate. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Orthoformic acid」の詳細全文を読む スポンサード リンク
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