A heterocyclic compound containing two nitrogen atoms in the ring. Also known as 1,3-diazole. It is produced by reacting glyoxal with formaldehyde and ammonia. It is a colorless crystal that is strongly alkaline. It dissolves well in water, ethanol (ethyl alcohol), and ether, and dissolves in acid to form salts. It reacts with cobalt(II) ions to produce a blue-purple precipitate, making it a useful reagent for detecting cobalt. When it is nitrated with mixed acid (a mixture of nitric acid and sulfuric acid), it forms 4-nitroimidazole. [Masahiro Hirota] [References] | | [Supplementary information] |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
環内に窒素原子二つを含む複素環式化合物の一つ。1,3-ジアゾールの別名をもつ。グリオキサールにホルムアルデヒドとアンモニアを反応させると生成する。 無色の結晶で強い塩基性を示す。水、エタノール(エチルアルコール)、エーテルによく溶けるほか、酸に溶けて塩を生成する。コバルト(Ⅱ)イオンと反応して青紫色の沈殿を生ずるので、コバルトの検出試薬となる。混酸(硝酸と硫酸の混合物)によりニトロ化すると4-ニトロイミダゾールを生成する。 [廣田 穰] [参照項目] | | [補完資料] |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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