Fragmentation of organic molecules under electron impact. Part 1. Ureas
Abstract
The spectra of all the methylated ureas, ethylene urea, and certain alkyl, alkylaryl, and aryl ureas are reported and discussed. The spectra are all relatively simple, and in the main can be described in terms of bond fission to form R1R2N+ or R3R4[graphic omitted]CO or 1–3 hydrogen rearrangement to form [R1R2NH][graphic omitted] or [R3NCO][graphic omitted]. There is no evidence for the corresponding alkyl or aryl rearrangement.