【摘要】 通过“魔蓝”与各种硅烷的选择攫氢／自旋截捕反应的ＥＰＲ研究，阐明了硅烷中各部位氢原子的相对活性，指出了可能的攫氢部位．获取了攫氢后的自由基步骤及自由基中间体结构的有关信息，揭示了烷氧基的取代基效应表现为拉电子效应，同时表明用“魔蓝”研究硅化合物的攫氢反应是自由基反应机理研究的一种创新方法更多还原

【Abstract】 Regio selective H abstraction spin trapping reactions of silicanes by “magic blue” solution were studied by EPR detection of the F,Si nitroxides generated in the reactions .We have gained the information about the position of H abstraction,the subsequent radical steps after the H abstraction ,as were as the structures of the transient radical intermediates. As the number of alkoxyl group in the nitroxides increased , a N value decreased. It suggested that alkoxyl group has electron withdrawing effect from the nitroxyl nitrogen atom.Nevertheless, H abstraction from silicanes by “magic blue” is a new method in radical reaction studies.更多还原