作者:Waldemar. Adam、Klaus. Hannemann、R. Marshall. Wilson
DOI:10.1021/ja00265a015
日期:1986.3
been studied quantitatively. The lifetime of 1 has been found to range between 720 and 900 ns and that of 2 between 53 and 94 ns depending on the solvent. The biradical 1 was found to be trapped in essentially quantitative yield with no indication of oxygen-catalyzed intersystem crossing. In contrast, 2 was found to be trapped in 54-79% yield with the residual biradical quenching being due to oxygen-catalyzed
三线态 1,3-环戊二基 (1) 和三线态 1,4-双基 2-(2-乙基) 环戊-2-烯基 (2) 与分子氧的捕获已进行了定量研究。已发现 1 的寿命在 720 到 900 ns 之间,而 2 的寿命在 53 到 94 ns 之间,具体取决于溶剂。发现双自由基 1 以基本上定量的产率被捕获,没有氧催化系统间交叉的迹象。相比之下,发现 2 以 54-79% 的产率被捕获,残留的双自由基猝灭是由于氧催化的系统间交叉。这些和其他双自由基捕获数据已与 1,3-双自由基几何相关联,并且发现符合塞勒姆关于三重双自由基中自旋轨道耦合的规则。28 篇参考文献、7 幅图、2 张表格。