Abstract
The fragmentations of 1-azabicyclo [3.3.1]nonan-4-ols in electron ionization are discussed. The mass spectra of these compounds containing a hydroxyl and an alkyl groups at the 4 position revealed characteristic peaks at [M-17]+, m/z 182, m/z 168, m/z 154, m/z 140, m/z 112, m/z 97, m/z 96, m/z 84, m/z 82, m/z 70, and m/z 69. The compositions of the peaks were determined by a high resolution mass spectrometry. The fragmentation mechanisms for giving these peaks were based on observations of the corresponding to metastable peaks. In particular, the compounds contaning an alkyl substituent produce characteristic ions at m/z 182, m/z 168, and m/z 154 which resulted from loss of part of the alkyl group from the molecular ion.
