# possibility of metallic ammonium

In chemistry class, we discussed how metallic bonding occurs when metals lose electrons and become cations while the lose electrons become delocalized electrons and bind the metal cations. These electrons are then free to flow around the metal cations. But could the metal be replaced with an ammonium cation instead? (Or any other polyatomic cation, but we only learn ammonium and I'm not aware of any others minus hydronium which doesn't exist out of a solution.) Would the electrons still be free? How would you make it? And how could you prevent the following from occurring? $$\ce{2NH4+ + 2e- -> 2NH3 + H2}$$

• There are phases of solvated electrons in liquid ammonia that are metal-like. Thought these are created by dissolving metals like sodium in liquid ammonia. – matt_black Dec 22 '16 at 23:08
• Hydronium ion can be isolated in salts from very strong acids, like the perchlorate $\ce {H3OClO4}$. But you would not want to mess with it. – Oscar Lanzi Mar 29 '17 at 1:54