Departamento de Quimica Organica I, Facultad de Ciencias Quimicas, Universidad Complutense de Madrid (UCM), Ciudad Universitaria s/n. E-28040 Madrid, Spain.
Rapid Commun Mass Spectrom. 1999;13(14):1472-6. doi: 10.1002/(SICI)1097-0231(19990730)13:14<1472::AID-RCM669>3.0.CO;2-V.
The electron impact mass spectra of several 3,3-dimethyl-1, 2-norbornanediols, diamines, amino alcohols and related derivatives have been studied and their fragmentation pathways discussed. Different fragmentation patterns were observed, depending not only on the nature of the substituents, but also on their relative positions on the norbornane framework. In general, the dominant peaks in the spectra of these compounds originate from initial C1-C2 bond cleavage (alpha-cleavage) with charge retention on the heteroatom (oxygen or nitrogen) attached at the bridgehead position, followed by hydride shift and loss of the C2-C3 fragment by homolytic cleavage of the C3-C4 bond. This fragmentation pathway leads to a highly stabilized cyclopentenylimmonium or cyclopentenyloxonium ion, which constitutes the base peak in the spectra in most of the studied compounds. Copyright 1999 John Wiley & Sons, Ltd.
对几种3,3-二甲基-1,2-降冰片二醇、二胺、氨基醇及相关衍生物的电子轰击质谱进行了研究，并讨论了它们的碎裂途径。观察到了不同的碎裂模式，这不仅取决于取代基的性质，还取决于它们在降冰片烷骨架上的相对位置。一般来说，这些化合物谱图中的主要峰源自最初的C1-C2键断裂（α-裂解），电荷保留在桥头位置连接的杂原子（氧或氮）上，随后发生氢化物迁移，并通过C3-C4键的均裂失去C2-C3片段。这种碎裂途径会产生高度稳定的环戊烯基亚铵离子或环戊烯基氧鎓离子，在大多数研究的化合物谱图中，该离子构成了基峰。版权所有1999约翰·威利父子有限公司。
