Because we have paired set in a2 s orbital, so all we're left essentially is two electrons that are available for bonding. 因为我们有一对,在2s轨道里已经配对了,所以只剩下两个电子可以用来成键。
Recently physicists have been studying a kink, or bend, that appears in graphs that plot the energies of paired electrons as a clue to the force that causes the pairing. 最近物理学家研究了成对电子能量图表里的「弯折」,做为造成配对力量的一个线索。
To allyl alcohol and benzyl alcohol, the paired electrons of oxygen can be conjugated with double bond and thus the electron cloud density decreased, so the nucleophilicity was decreased. 丙烯醇和苯甲醇由于氧原子上的电子能与双键产生共轭而使氧上的电子云密度降低,亲核性减弱,因而转化率较低。