| Abstract: | The mass spectra of isomeric 3- and 7-cyclohexyl-2-norbornanols have been studied. The 3-substituted norbornanols give very similar mass spectra, whereas large differences were observed between the mass spectra of 7-syn and 7-anti isomers. While the mass spectra of these bicyclic alcohols show extensive rearrangements to give rise to many odd-electron ions, the Wagner-Meerwein rearrangement of the molecular ion prior to fragmentation or during the process of dehydration is not important. The origins and the mechanisms for the formation of some major ions are discussed in terms of low voltage spectra, defocused metastables and their relative abundances, and ionization or appearance potentials of the ions of interest. |
