The ESI CAD fragmentations of protonated 2,4,6-tris(benzylamino)- and tris(benzyloxy)-1,3,5-triazines involve benzyl-benzyl interactions: a DFT study
作者:M. Ramesh、B. Raju、M. George、K. Srinivas、V. Jayathirtha Rao、K. Bhanuprakash、R. Srinivas
DOI:10.1002/jms.3037
日期:2012.7
Moreover, protonated 2,4,6‐tris(1‐phenylethylamino)‐1,3,5‐triazine (5) dissociates via three successive losses of styrene. Density functional theory (DFT) calculations indicate that an ion/neutral complex (INC) between benzyl cation and the rest of the molecule is unstable, but the protonated molecules of 1 and 6 rearrange to an intermediate by the migration of a benzyl group to the ring ‘N’. Subsequent
质子化的2,4,6-三(苄氨基)-1,3,5-三嗪(1)和2,4,6-三(苄氧基)-1,3,的电喷雾电离碰撞活化解离(CAD)质谱5-三嗪(6)显示出m / z 181(C 14 H 13 +)丰富的产物离子。C 14 H 13 +的可能结构是α-[2-甲基苯基]苄基阳离子,表明其中一个苄基必须在质子化分子解离之前迁移至另一个。“ N”模拟物(1)的碰撞能量较高,但“ O”模拟物(6)的碰撞能量较低,表明1的碎裂过程需要高能量。其他主要碎片是[M + H-甲苯] +和[M + H-苯] +分别用于化合物1和6。质子化的2,4,6-三(4-甲基苄氨基)-1,3,5-三嗪(4)表现出竞争性消除p-二甲苯和3,6-二亚甲基环六-1,4-二烯。此外,质子化的2,4,6-三(1-苯基乙基氨基)-1,3,5-三嗪(5)通过连续三个苯乙烯损失而解离。密度泛函理论(DFT)计算表明,苄基阳离子与分子其余部