The effect ofortho substitution on the mass spectral fragmentation of polychlorinated biphenyls
作者:Louis A. Levy、Edward O. Oswald
DOI:10.1002/bms.1200030209
日期:1976.4
Isomeric chlorinated biphenyls are observed to yield very similar mass spectra, rarely exhibiting a [M - Cl]+ fragment of any significant magnitude. However, those isomers containing three ortho chloro substituents display a relatively intense [M - Cl]+ fragment. A rationalization for this observation is put forth on the basis of the relative stabilities of both product and reactant.
观察到异构的氯化联苯产生了非常相似的质谱,几乎没有表现出任何明显幅度的[M-Cl] +片段。然而,那些含有三个邻氯取代基的异构体表现出相对强烈的[M-Cl] +片段。基于产物和反应物两者的相对稳定性,提出了对该观察结果的合理化。