卤素取代的质子化胺和季铵离子(R 1 R 2 R 3 N + CH 2(CH 2)n X的碎片,其中X = F,Cl,Br,I,n = 1、2、3、4通过电喷雾电离串联质谱研究。在碰撞诱导的离解中观察到由卤素转移引起的特征性碎片离子(R 1 R 2 R 3 N + X)。提出了一种分子内卤素转移的新机制,该机制涉及一种反应性中间体[胺/ hal离子]。使用DFT计算CH 2的势能表面扫描质子化的2-溴-N,N-二甲基乙胺的-N键裂解过程支持该中间体的形成。通过检查分离的乙烯溴鎓离子与三乙胺之间的离子/分子反应来支持涉及溴离子中间体的卤素转移机理,该反应会生成N-溴-N,N,N-三乙基铵阳离子。对于其他卤素,Cl和I也可以参与类似的分子内卤素转移,但F不能参与。随着卤素(代表溴)和胺之间碳链的延长,卤素的迁移能力降低。当碳链包含两个或三个CH 2时单位(n = 1,2),可以进行正式的溴阳离子转移,当n
Organic–inorganichybridmaterials have received extensive attention and in-depth research in the past few decades due to their superior properties and potential applications in storage, sensing, dielectric switches, actuators and other information fields. Based on this scientific background, we developed two organic–inorganichybrids [TMFEA]2CdI4 (compound 1) and [TMFEA]2ZnI4 (compound 2) (TMFEA =
A novel organic–inorganic hybrid material [Me3NCH2CH2F]FeBr4 (1) with a true three-step “on–off–on–off” SHG switch above room temperature is a rare nonlinear optical (NLO) material.
McCombie; Saunders, Nature, 1946, vol. 158, p. 383
作者:McCombie、Saunders
DOI:——
日期:——
Über Fluorcholin, Phenacetylcholin und Naphthacetylcholin
作者:G. Kubiczek、L. Neugebauer
DOI:10.1007/bf00897773
日期:1949.5
277. Toxic fluorine compounds containing the C–F link. Part V. (a) Fluorine-containing ammonium salts (with I. G. E. W<scp>ILDING</scp>). (b) Relationship between physiological action and chemical constitution