aminiumyl radical ions

Radicals cations, R3N.+ derivable from aminium ions, R3NH+ , by removal of a hydrogen atom. Aminiumyl radical ions are, except for H3N.+ , synonymous with the ammoniumyl radical ions. As the term ammonium is well known, ammoniumyl radical ions is the more desirable class name.
See: ammoniumyl radical ions
PAC, 1995, 67, 1307 (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1316