On the loss of a benzyl radical from the molecular ion of α,ω -dibenzyloxyalkanes
作者:A.P. Bruins、N.M.M. Nibbering
DOI:10.1016/s0040-4020(01)97030-9
日期:1974.1
The molecular ions of the title compounds appear to lose a benzyl radical, which must be due to the presence of two benzyloxy groups, as benzylalkyl ethers do not exhibit such an expulsion upon electron impact. The results of the partition of the labels deuterium and 18O in the ions m/e 107 (protonated benzaldehyde) and [M-benzyl-benzaldehyde]+ put forward evidence that this process is initiated by
标题化合物的分子离子似乎丢失了苄基,这必须归因于两个苄氧基的存在,因为苄基烷基醚在电子撞击时不会表现出这种驱逐作用。标记氘和18 O在离子m / e 107(质子化的苯甲醛)和[M-苄基-苯甲醛] +中的分配结果表明,该过程是由苄基H原子连续迁移至在S N i型反应中,醚的功能相反,苄基阳离子从该质子化的O原子转移至不带电荷的O原子(参见方案5)。