Description:
<jats:title>Abstract</jats:title><jats:p>Substited pivalanilides give rise to fragments corresponding to anilies on electron‐impact, which is due to the migration of a hydrogen atom from the <jats:italic>t</jats:italic>‐butyl group to the nitrogen. The Hammett correlation indicates that the formation of this fragment is favoured by electron‐donating groups. The other interesting feature of these spectra is the migration of the aryl group to the <jats:italic>t</jats:italic>‐butyl carbon with the elimination of the neutral ketemine.</jats:p>