Isomerization of the constituents of ion/neutral complexes during the fragmentation of protonated dialkyl-substituted 1,3-diphenylpropanes
作者:Dietmar Kuck、Carsten Matthias、Dieter Barth、Matthias C. Letzel
DOI:10.1016/j.ijms.2010.10.007
日期:2011.9
C6H11+ ions, formed from the [M+H]+ ions of (4-cyclohexyl)- and of 4-(1-methylcyclopentyl)-substituted 1,3-diphenylpropane, indicate that the C6H11+ ions only partially retain their structural identity: while the secondary isomer, (CH2)5 > CH+, predominantly transfers a proton in competition to hydride abstraction, indicating its stronger Bronsted acidity, the tertiary isomer, (CH2)4 > C+CH3, mainly
摘要 气态离子/中性复合物 [R+⋯C6H5CH2CH2CH2C6H4–R'] 的碎裂,其中 (i) R = R' = C4H9,(ii) R = C4H9 和 R' = CH3 以及 (iii) R = C6H11 和 R' =已通过相应烷基取代的 1,3-二苯基丙烷的 CI(CH4)-MIKE 光谱法研究了 H。与包含两个对位烷基取代基的所有其他异构体不同,由对称离子 [(4-tert-C4H9-C6H4)CH2CH2CH2(C6H4-4-tert-C4H9) + H]+ 产生的 [M+H]+ 离子显示含有间位烷基取代的 1,3-二苯基丙烷的离子-中性复合物的特征碎片模式。这表明质子诱导的一个或什至两个 tert-C4H9 基团发生 1,2-位移,并且需要存在间位(tert-C4H9)取代的二苯基丙烷作为最终分裂的 I/N 复合物的中性成分. 作为结果,似乎反应性复合物 [C4H9+⋯