Oxidation of 1,3-Diphosphacyclobutane-2,4-diyl with Ammoniumyl Antimonate and EPR Study of the Corresponding Cation Radical
作者:Masaaki Yoshifuji、Anthony J. Arduengo, III、Tatyana A. Konovalova、Lowell D. Kispert、Manabu Kikuchi、Shigekazu Ito
DOI:10.1246/cl.2006.1136
日期:2006.10
A sterically protected biradical species, 1-tert-butyl-3-methyl-2,4-bis(2,4,6-tri-tert-butylphenyl)-1,3-diphosphacyclobutane-2,4-diyl was allowed to react with tris(4-bromophenyl)ammoniumyl hexachloroantimonate as an oxidant and the product was analyzed by EPR to show that the biradical was oxidized to give the corresponding radical cation species. The structure of the cation radical was also supported by ab initio calculations on a model compound.
一种空间位阻型双自由基物种,1-叔丁基-3-甲基-2,4-双(2,4,6-三叔丁基苯基)-1,3-二磷杂环丁烷-2,4-二基被允许与三(4-溴苯基)铵六氯锑酸盐作为氧化剂发生反应,并通过EPR分析产物,结果表明双自由基被氧化为相应的自由基阳离子物种。阳离子自由基的结构也得到了模型化合物从头计算的支持。