Salts in which the cation has the structure
R2C=N+R2. Thus
N-hydronated imines and their
N-substituted derivatives. The synonymous terms imonium compounds and immonium compounds are irregularly formed and should not be used.
See: quaternary ammonium compounds
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1343 (https://doi.org/10.1351/pac199567081307)