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A Criegee intermediate (also called a Criegee zwitterion or Criegee biradical) is a carbonyl oxide with two charge centres. These molecules help to break down sulfur dioxide and nitrogen dioxide in the atmosphere, and may help offset global warming.〔Oliver Welz, John D. Savee, David L. Osborn, Subith S. Vasu, Carl J. Percival, Dudley E. Shallcross, Craig A. Taatjes. Direct Kinetic Measurements of Criegee Intermediate (CH2OO) Formed by Reaction of CH2I with O2. ''Science'', 2012; 335 (6065): 204-207 〕 The formation of Criegee biradicals was first postulated in the 1950s by Rudolf Criegee. The infrared absorption spectrum of the simplest Criegee intermediate (CH2OO) has recently been published by the team of Lee and Witek.〔(【引用サイトリンク】url=http://www.sciencemag.org/content/340/6129/174.full )〕 == See also == *Criegee rearrangement *Biradical 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「Criegee intermediate」の詳細全文を読む スポンサード リンク
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