Interactions of nickel(II) ions in protic ionic liquids comprising N-hexyl(or N-2-ethtylhexyl)ethylenediamines

Synopsis: Nickel(II) ion forms the tris(alkylen) complex in the PILs at lower concentrations of the nickel(II) ions and the complex changes to the di(aniono)bis(alkylen) complex with an increase in the nickel(II) ion concentrations.