quaternary ammonium compounds

Derivatives of @A00290@, (NH4+)Y, in which all four of the hydrogens bonded to nitrogen have been replaced with @H02891@ groups. Compounds having a carbon-nitrogen double bond (i.e. R2C=N+R2Y) are more accurately called @I02958@. e.g. [(CH3)4N]+OH, tetramethylammonium hydroxide.
hydrocarbyl groups
iminium compounds
onium compounds
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1361 [Terms] [Paper]