what chemical is NH
It is formed by the protonation of ammonia (NH 3). Ammonium is also a general name for positively charged or protonated substituted amines and quaternary ammonium cations (NR 4 +), where one or more hydrogen atoms are replaced by organic groups (indicated by R).n example of a reaction forming an ammonium ion is that between dimethylamine, (CH 3) 2 NH, and an acid, to give the dimethylaminium cation, (CH 3) 2 NH + 2 : Quaternary ammonium cations have four organic groups attached to the nitrogen atom.