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邻基参与
释义
邻基参与
Encyclopedia
理学
邻基参与
释
neighboring group participation
邻基参与
进行亲核取代反应的底物分子,若同时存在亲核的基团和离去基团,且这两种基团在空间位置上的距离也适当,则在亲核取代反应的条件下,将优先发生分子内的亲核取代反应,生成环状产物,从而影响反应的立体选择性、区域选择性或活性的现象。又称邻助作用。
Chemistry
>有机化学>有机合成化学>释义
neighboring group participation
邻基参与
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national ethic
national ethics
National Ethnic minority Folk Art Exhibition
National Ethnic Museum of China
nationa leveling network
National Excellent Multimedia CD Evaluation
National Excellent Radio Program Award
National Excellent TV News Award
National Excellent TV Social Education Program Award
national excellent urban and rural planning and design award
National Exhibition on Stagecraft 1982
National Exit and Entry Personnel Information Database
national extreme drought from 2000 to 2001
National Factors in Party and State Affairs
national famous teacher award
National Farmers' Federation,NFF
National Farmers’Games of the People's Republic of China
National Federation of Coffee Growers of Colombia
National Federation of Educational Associations
National Federation Party
National Field Station for Grassland Science
National Film and Sound Archive of Australia
National Film Archive of India
National Film Board
National Film Board of Canada
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