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〕 |Section1= |Section2= |Section3= |Section7= |Section8= }} Selenous acid (or selenious acid) is the chemical compound with the formula H2SeO3. Structurally, it is more accurately described by (HO)2SeO. It is the principal oxoacid of selenium; the other being selenic acid. ==Formation and properties== Selenous acid is analogous to sulfurous acid, but it is more readily isolated. Selenous acid is easily formed upon the addition of selenium dioxide to water. As a crystalline solid, the compound can be seen as pyramidal molecules that are interconnected with hydrogen bonds. In solution it is a diprotic acid:〔Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.〕 : + (pKa = 2.62) : + (pKa = 8.32) It is moderately oxidizing in nature, but kinetically slow. In 1 M : : + 4 + 4 e− Se + 3 (''E'' In 1 M : : + 4 e− + 3 Se + 6 (''E'' It is used in organic synthesis for the synthesis of 1,2-diketones (e.g. glyoxal).〔(“Glyoxal Bisulfite” ), Organic Syntheses, Collected Volume 3, p.438 (1955).〕 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「selenous acid」の詳細全文を読む スポンサード リンク
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