Mass spectrometry of nitroazoles: 3—ortho effects: The loss of OH˙ and H2O from methyl substituted nitrodiazoles

Abstract
Methyl substituted nitrodiazoles which have the substituents at adjacent positions in the ring are subject to several ortho effects. Deuterium labelling of the methyl group and the mobile N‐bonded hydrogen show that the loss of OH˙ originates from the substituents. In some cases the N‐bonded hydrogen atom participates also in the loss of OH˙ and of H2O.