Determination of aluminium electronegativity in new ambient-temperature acidic molten salts based on 3-butyl-1-methylimidazolium chloride and ALEt 3–x Cl x (x= 0–3) by 1 H nuclear magnetic resonance spectroscopy

Aluminium electronegativity in molten salts based on 3-butyl-1-methylimidazolium chloride and AlEtCl2, AlEt2Cl, AlEt3 and mixtures of AlEtCl2 and AlCl3 has been determined by the modified Dailey–Shoolery equation using 1H NMR spectroscopy. For Al to 3-butyl-1-methylimidazolium chloride molar ratios between 1 : 1 and 3 : 1 there is a linear relationship between the aluminium electronegativity of the anionic species present in the melts and the molar composition.