IUPAC definition : Derivatives of ammonium compounds, (NH sub 4 /sub sup class plus /sup )Y sup class
minus /sup , in which all four of the hydrogens bonded to nitrogen have been replaced
with hydrocarbyl groups. Compounds having a carbon-nitrogen double bond (i.e. R sub
2 /sub C N sup class plus /sup R sub 2 /sub Y sup class minus /sup ) are more
accurately called iminium compounds. e.g. [(CH sub 3 /sub ) sub 4 /sub N] sup class
plus /sup OH sup class minus /sup , tetramethylammonium hydroxide.;
Derivatives of ammonium compounds, (NH sub 4 /sub sup class plus /sup )Y sup class
minus /sup , in which all four of the hydrogens bonded to nitrogen have been replaced
with hydrocarbyl groups. Compounds having a carbon-nitrogen double bond (i.e. R sub
2 /sub C N sup class plus /sup R sub 2 /sub Y sup class minus /sup ) are more
accurately called iminium compounds. e.g. [(CH sub 3 /sub ) sub 4 /sub N] sup class
plus /sup OH sup class minus /sup , tetramethylammonium hydroxide.