...主目录 返回 2008-1-21α和β 位氢有弱酸性 R C W R C- W H B H 有弱酸性 B- （碱） W: 吸电子基（electron withdrawing group） （ ） 在卤代烷中 δδ δ R C C X C C X- HNu β α β R α H H H Nu- 消除βH成烯烃 成 β α和β位氢均有弱酸性 消除反应El...
The electronwithdrawinggroup (F) being introduced into the alkyl groups of then-hexyl ZDDP is able to strengthen chemical adsorption between ZDDP and Fe atoms.
在伯烷基上吸电子基团能增强硫原子与铁原子之间的化学吸附作用力。
2
Moreover, We found that the relaxation time of H2TPP with donating electrongroup is about 7 times faster than that with withdrawingelectrongroup.
另外，还发现推电子基团取代的卟啉弛豫过程比吸电子基团取代的卟啉弛豫过程快7倍。
3
The dinitrobenzene with electron-withdrawinggroup can be hydrogenated much easier than the dinitrobenzene with electron-donating group.