mon ium ▁c ations , ▁R 2 N H ▁( pro ton ated ▁secondary ▁am ines ) ▁dim eth yl am mon ium ▁( s ometimes ▁dim eth yl amin ium ), ▁CH 3 ) 2 N H ▁( pro ton ated ▁dim eth yl am ine ) ▁di eth yl am mon ium ▁( s ometimes ▁di eth yl amin ium ), ▁C 2 H 5 ) 2 N H ▁( pro ton ated ▁di eth yl am ine ) ▁eth yl m eth yl am mon ium , ▁C 2 H 5 CH 3 N H ▁( pro ton ated ▁eth yl m eth yl am ine ) ▁di eth an ol am mon ium ▁( s ometimes ▁di eth an ol amin ium ), ▁( C 2 H 4 OH ) 2 N H ▁( pro ton ated ▁di eth an ol am ine ) ▁t ert i ary ▁am mon ium ▁c ations , ▁R 3 N H + ▁( pro ton ated ▁t ert i ary ▁am ines ) ▁trim eth yl am mon ium ▁( CH 3 ) 3 N H + ▁( pro ton ated ▁trim eth yl am ine ) ▁tri eth yl am mon ium ▁( C 2 H 5 ) 3 N H + ▁( pro ton ated ▁tri eth yl am ine ) ▁qu atern ary ▁am mon ium ▁c ations , ▁R 4 N + ▁or ▁NR ▁t et ram eth yl am mon ium , ▁( CH 3 ) 4