https://doi.org/10.1351/goldbook.A00268
Cations formally derived by the addition of one @H02904@ to the N or O atom of an @A00266@ and N-@H02891@ derivatives thereof. In organic chemistry an unspecified amidium ion is commonly a carboxamidium ion
A00268-1.png
or A00268-2.png
The term does not imply knowledge concerning the position of the cationic centre, e.g. N,N,N-trimethylbenzamidium.