Formation of ionic liquids of divalent metal complexes comprising N‑alkylethylenediamines and the solvation of the nickel(II) complexes

The solid-to-liquid transition temperatures (TMP) for dipositive analogous bis(alkyl‑en)metal(II) (metal = nickel, copper, and zinc) and tris(alkyl‑en)nickel(II) complexes fall in a wide range of −50 to 250 °C depending on the molecular structures.137