芳基烷氧基硅烷与“魔蓝”攫氢反应的EPR研究  

EPR STUDIES ON H ABSTRACTION FROM ARYL ALKOXYSILICANE BY “MAGIC BLUE”

作　　者：廖海星[1] 龚跃法[1] 赵成学[1] 

机构地区：[1]华中理工大学化学系

出　　处：《华中师范大学学报（自然科学版）》1996年第4期442-446,共5页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金(青年)基金

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”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.

关 键 词：芳基烷氧基硅烷 攫氢反应 EPR 魔蓝 

分 类 号：O627.41[理学—有机化学]