Ammonium tetraperchloratoaluminate can be formed by three moles of nitronium perchlorate, one mole of anhydrous aluminium chloride, and one mole of ammonium perchlorate combined in liquid sulfur dioxide.
22.
When combined with nitric acid, sulfuric acid acts both as an acid and a dehydrating agent, forming the nitronium ion, which is important in nitration reactions involving electrophilic aromatic substitution.
23.
The solid form of dinitrogen pentoxide, 2 5, actually consists of nitronium and nitrate ions, so it is an ionic compound, [ NO 2 + ] [ NO 3 " ], not a molecular solid.
