Substituenteneinfluss bei der massenspektrometrischen Fragmentierung: Untersuchungen an N-methyl-?,??-diphenyl-di�thylaminen. 19. Mitteilung �ber das massenspektrometrische Verhalten von Stickstoffverbindungen
作者:Peter A. Weibel、Manfred Hesse
DOI:10.1002/hlca.19730560728
日期:1973.11.7
Some different substituted N-methyl-β,β′-diphenyl-diethylamines (I) were investigated mass spectrometrically. The main fragmentations and their genesis are summarized in Scheme 2. The molecular ion generates the major fragmentions a (m/e 148) and b (m/e (147 + X)); c (m/e 105) is formed from a and d (m/e (104+X)) from b by further decomposition. The logarithms of the ratios of the relative ion intensities
质谱研究了一些不同的取代的N-甲基-β,β'-二苯基-二乙胺(I)。方案2总结了主要的碎片及其成因。分子离子产生主要的碎片a(m / e 148)和b(m / e(147 + X));c(m / e 105)由a和d(m / e(104 + X))由b进一步分解形成。相对离子强度比a / b,c / a和d / b的对数根据Hammett进行关联具有不同取代基常数的方程。发现以下相关系数(在20ev时):r = 0,98(σ +),r = 0,63(σ)和r = 0,96(σ)。基于以上Hammett相关性,讨论了这种研究对于阐明质谱碎裂机理的价值。