Hydrogen and trimethylsilyl transfers during EI mass spectral fragmentation of hydroxycarboxylic and oxocarboxylic acid trimethylsilyl derivatives
作者:Jean-François Rontani、Claude Aubert
DOI:10.1016/j.jasms.2007.10.014
日期:2008.1.1
the case of hydroxycarboxylic acid trimethylsilyl derivatives of formula RCHOTMS(CH2)nCOOTMS and at [RC(OTMS)=CH2]+., [RC(=OTMS)CH=CH2]+, and [M-RC(=O)CH2]+ in the case of oxocarboxylic acid trimethylsilyl esters of formula RC(=O)(CH2)nCOOTMS. Some of these fragmentations appeared to be sufficiently specific to be used to characterize these compounds. Several fragmentation pathways involving trimethylsilyl
这篇论文描述了一些羟基羧酸和氧代羧酸三甲基甲硅烷基衍生物的电子电离质谱碎片,重点关注这些化合物的两个官能团之间相互作用导致的碎片离子的形成。这些相互作用导致在 [CH2=C(OTMS)2]+.、[CH2=CHC(OTMS)=OTMS]+、[M-31]+、[M-105]+ 和 [ M-RCHO]+。对于式 RCHOTMS(CH2)nCOOTMS 和 [RC(OTMS)=CH2]+.、[RC(=OTMS)CH=CH2]+ 和 [M-RC(=O)CH2] 的羟基羧酸三甲基甲硅烷基衍生物的情况]+ 在式 RC(=O)(CH2)nCOOTMS 的氧代羧酸三甲基甲硅烷基酯的情况下。其中一些碎片似乎具有足够的特异性,可用于表征这些化合物。