from those of the other isomers. The primary ion spectra of most isomeric compounds are similar, with successive losses of Cl· from the molecular ion. This process is often accompanied by expulsion of HCl from the lower chlorine homologues (2)–(5) but only the reactions which expel Cl· are accompanied by metastable ions. The ion kinetic energy spectra of the di- and tetra-chloroisomers confirm the suggested
几种二
氯和四
氯联苯的质谱表明,在裂解之前,
氯在分子离子中的两个苯环上均是随机化的。2,2'-和2,6-二
氯-,2,2',4,4'-,2,2',5,5'-,2,3,5,6-和2除外2',6,6'-四
氯联苯都含有两个或多个与Ph-Ph键邻位的
氯原子,它们的亚稳离子强度由M → M – Cl 2引起反应明显不同于其他异构体。大多数异构化合物的主离子光谱相似,分子离子连续损失Cl·。此过程通常伴随着从较低
氯同系物(2)-(5)排出HCl,但只有将Cl·排出的反应才伴随有亚稳离子。二
氯和四
氯异构体的离子动能谱证实了建议的裂解途径。