Use of Dimethylsilyl Ethers for Characterizing Primary Aliphatic Alcohols: A comparison of mass spectrometric fragmentation of di- and trimethylsilyl derivatives
作者:Wilhelm J. Richter、Don H. Hunnemann
DOI:10.1002/hlca.19740570420
日期:1974.4.27
Mass spectral fragmentation patterns of dimethylsilyl (DMS) ethers of primary unbranched, branched, and secondary unbranched aliphatic alcohols in the C5 to C10 range are compared with those of the corresponding trimethylsilyl (TMS) derivatives. Unlike their TMS analogues, DMS ethers of primary alcohols exhibit pronounced rupture of the CC bond adjacent to the oxygen atom within the alkyl moiety (loss
将C 5至C 10范围内的伯直链,支链和仲直链脂族醇的二甲基甲硅烷基(DMS)醚的质谱裂解图谱与相应的三甲基甲硅烷基(TMS)衍生物的质谱图谱进行了比较。与它们的TMS类似物不同,伯醇的DMS醚在烷基部分内的氧原子附近显示CC键断裂(烷基基团R的损失),显着优先于甲硅烷基取代基内的裂解(CH 3的损失))。因此,在这类化合物中,可以使用DMS衍生物的补充制备物来建立或确认位点,从而确定羟基的主要性质,而TMS醚的制备在减小分子大小方面可能是有利的。对于仲醇的衍生物,未观察到在裂解行为上的诊断上有用的差异。