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|Section2= |Section3= }} The chemical compound 1,2-dioxetanedione, or 1,2-dioxacyclobutane-3,4-dione, often called peroxyacid ester, is an unstable oxide of carbon (an oxocarbon) with formula C2O4. It can be viewed as a double ketone of 1,2-dioxetane (1,2-dioxacyclobutane), or a cyclic dimer of carbon dioxide.〔Alfred Hassner (1985): Chemistry of Heterocyclic Compounds: Small Ring Heterocycles, Part 3: Oxiranes, Arene Oxides, Oxaziridines, Dioxetanes, Thietanes, Thietes, Thiazetes, and Others, Volume 42. ISBN 978-0-471-05624-9 ISBN 978-0-470-18720-3 John Wiley & Sons. 〕 In ordinary conditions, it quickly decomposes to carbon dioxide (CO2) even at , but can be detected by mass spectrometry and other techniques.〔 〕〔 〕 1,2-Dioxetanedione is an intermediate in the chemoluminescent reactions used in glowsticks.〔 〕 The decomposition proceeds via a paramagnetic oxalate biradical intermediate.〔 〕 Recently it has been found that a high-energy intermediate in one of these reactions (between oxalyl chloride and hydrogen peroxide in ethyl acetate), which is presumed to be 1,2-dioxetanedione, can accumulate in solution at room temperature (up to a few micromoles at least), provided that the activating dye and all traces of metals and other reducing agents are removed from the system, and the reactions are carried out in an inert atmosphere.〔Luiz F. M. L. Ciscato, Fernando H. Bartoloni, Erick L. Bastos, and Wilhelm J. Baader (2009), ''Direct Kinetic Observation of the Chemiexcitation Step in Peroxyoxalate Chemiluminescence''. Journal of Organic Chemistry, volume 74, 8974–8979. .〕 ==See also== * 1,3-dioxetanedione 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「1,2-Dioxetanedione」の詳細全文を読む スポンサード リンク
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