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http:///mymemo.xyz/wiki/api.php?action=feedcontributions&user=119.228.210.252&feedformat=atom 2024-05-01T13:26:47Z 利用者の投稿記録 MediaWiki 1.31.0 2013-04-01T01:05:37Z

<p>119.228.210.252: 過硫酸カリウム→ペルオキソ二硫酸カリウム</p> <hr /> <div>{{Infobox 無機化合物<br /> | name=二硫酸<br /> | 画像=[[Image:Dischwefelsäure - Disulfuric acid.svg|150px|二硫酸の構造式]][[File:Pyrosulfuric-acid-3D-balls.png|200px|二硫酸の球棒モデル]]<br /> | IUPAC名=<br /> | 別名=ピロ硫酸<br /> | 組成式=H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;7&lt;/sub&gt;S&lt;sub&gt;2&lt;/sub&gt;<br /> | 式量=178.14<br /> | 形状=無色固体、吸湿性<br /> | 結晶構造=<br /> | CAS登録番号=[7783-05-3]<br /> | 密度= | 相 =<br /> | 水への溶解度= | 温度=<br /> | 融点= 35 | 融点注=<br /> | 沸点= | 沸点注=<br /> | 出典=<br /> }}<br /> &#039;&#039;&#039;二硫酸&#039;&#039;&#039;（にりゅうさん）は[[硫黄]]の[[オキソ酸]]のひとつ。&#039;&#039;&#039;ピロ硫酸&#039;&#039;&#039;（pyrosulfuric acid）とも呼ばれる。[[化学式]]はH&lt;sub&gt;2&lt;/sub&gt;S&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;7&lt;/sub&gt;。2分子の硫酸が脱水縮合した化合物に相当する。[[発煙硫酸]]中に存在し、芳香族化合物に対して[[スルホン化]]剤としてはたらく。<br /> <br /> == 合成・単離 ==<br /> スルホン化やニトロ化などにおいて二硫酸の反応性を利用するときは、通常は発煙硫酸をそのまま用いる。<br /> <br /> ある報告によれば、65% の[[三酸化硫黄]] (SO&lt;sub&gt;3&lt;/sub&gt;) を含む発煙硫酸に[[ヒ素]]の粉末を懸濁させ、そこへ[[ペルオキソ二硫酸カリウム]] (K&lt;sub&gt;2&lt;/sub&gt;S&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;8&lt;/sub&gt;) を加えると、ゆっくりと二硫酸の無色結晶が生じてくる&lt;ref&gt;Hoenle, W. &#039;&#039;Z. Kristallogr.&#039;&#039; &#039;&#039;&#039;1991&#039;&#039;&#039;, &#039;&#039;196&#039;&#039;, 279.&lt;/ref&gt;。<br /> <br /> ==用途==<br /> 反応性は、記事：[[発煙硫酸]]を参照のこと。<br /> <br /> ==関連項目==<br /> *[[過硫酸]]<br /> *[[亜ジチオン酸]]<br /> *[[二亜硫酸]]<br /> *[[亜硫酸]]<br /> *[[チオ硫酸]]<br /> *[[ジチオン酸]]<br /> *[[ポリチオン酸]]<br /> *[[硫酸]]<br /> *[[ペルオキソ二硫酸]]<br /> *[[発煙硫酸]]<br /> <br /> == 参考文献 ==<br /> &lt;references /&gt;<br /> <br /> {{水素の化合物}}<br /> {{硫黄の化合物}}<br /> {{Chem-stub}}<br /> {{DEFAULTSORT:にりゆうさん}}<br /> [[Category:酸無水物]]<br /> [[Category:硫黄の化合物]]</div>

119.228.210.252
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