<Tr> <Td_colspan="2"> Infobox references </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <P> The nitronium ion, N O + 2, is a cation . It is an onium ion because of its tetravalent nitrogen atom and + 1 charge, similar in that regard to ammonium . It is created by the removal of an electron from the paramagnetic nitrogen dioxide molecule, or the protonation of nitric acid (with removal of H O). </P> <P> It is stable enough to exist in normal conditions, but it is generally reactive and used extensively as an electrophile in the nitration of other substances . The ion is generated in situ for this purpose by mixing concentrated sulfuric acid and concentrated nitric acid according to the equilibrium: </P>

What is the shape of no2+ ion