spectrometry (MS/MS), exact mass measurement and isotopic labeling experiments, it has been established that the two trimethylsilyloxy groups in the TMS ethers interact across a wide range of distances via an ion-neutral complex. The migration of a TMS cation occurs when the group that is bound to carbon is expelled as a radical by an oxygen-directed cleavage to give a trimethylsilylated oxonium ion. If, on
(
CH3)3SiO-CR2-X-CR2-OSi( )3的两个片段是甲基或R基团的丢失(其中R是H或烷基)。[MR] +和[M- ] +离子的亚稳态离子解离包括三甲基甲
硅烷基(TMS)阳离子和( )2Si = O中性物质通过离子中性配合物的重排。基于串联质谱(MS / MS),精确的质量测量和同位素标记实验,已确定TMS醚中的两个三甲基甲
硅烷基氧基通过离子中性络合物在很宽的距离范围内相互作用。当与碳键合的基团通过氧直接裂解被驱逐出自由基以生成三甲基甲
硅烷基化的氧鎓离子时,会发生TMS阳离子的迁移。另一方面,如果 甲基从
硅原子上丢失,然后( )2Si = O迁移。TMS阳离子和中性( )2Si = O的迁移率受刚性基团使电荷离域的能力控制。