| Popis: |
Reactions which simulate acid catalysed rearrangements in solution have been demonstrated in organic cations generated by chemical ionisation in the mass spectrometer. The pinacol-pinacolone rearrangement has been shown to occur following protonation of various pinacols with C4H9+. In related reactions, a number of aldehydes, RC(R1R2) · CHO, following protonation in the gasphase, undergo rearrangement to the protonated ketones, HC(R1R2) · CO · R. All the above rearrangements have been demonstrated via Collision-Induced Dissociation (CID) in the third field-free region of a triplesector mass spectrometer, followed by Massanalysed-Ion-Kinetic-Energy (MIKE) spectrometry. |
