FAB-B/E联动扫描亚稳离子谱法鉴别2,3-二氰基-2,3-二苯基丁二酸二乙酯及其衍生物——p-X(X=CH_3,OCH_3)取代苯基系列化合物dl和meso构型

Identification of the Configurations of dl and meso-diethyl-2,3-dicyano-2,3-diphenyl Succinates and Its p-(X)-Substituted Phenyl Derivatives by FAB-B/E Link Scan Metastable Ion Spectrometry

质谱技术用于区分异构体已有不少有意义的工作,Beynon等利用亚稳离子谱鉴别异构体,提出离子动能谱具有化合物独特的“指纹”作用,是鉴别EI谱图相似的同分异构体的有效方法,苏克曼等用EI-B/E联动扫描技术研究了常规EI谱极为相似的二元取代苯位置异构体的谱图,讨论了用EI-B/E联动扫描亚稳离子谱鉴别二元取代苯位置异构体的作用。

In this paper, three pairs of dl and meso-diethyl-2,3-dicyano-2,3-diphenyl succinate and its derivatives of p-(X)substituted phenyl succinates(X = H,CH3,OCH3) were analyzed by using FAB-B/E linked scan metastable ion spectrometry. The effect and applicability of this method in identification of the configuration of these isomers were discussed.