The fragmentation pathways for the mesoionic systems and the marked differences with the non-mesoionic analogs can be easily rationalized by application of MO theory. In its present form, this MO interpretation is an extension of the usual resonance approach to the explanation of mass spectral reactions, which has been successfully applied to other heterocycles.
给出了一系列七个ψ-1,3,4-
噻二唑-2-
硫酮的高分辨和低分辨质谱数据。ψ-1,3,4-
噻二唑-2-
硫酮环系统的其他七个中离子杂环和两个非中离子类似物。通过应用MO理论,可以轻松地合理化中离子系统的碎裂途径以及与非中离子类似物的显着差异。以其当前形式,这种MO解释是对常规共振方法的扩展,以解释质谱反应,该方法已成功应用于其他杂环。