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Preferred Label : quaternary ammonium compounds;

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.;

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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.

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29/05/2025


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