Copper(II) compounds of some rigid dinucleating bis-amine–bis-imidazole ligands

The Mannich condensation of formaldehyde with some amines and imidazoles rendered three bis-(amine–imidazole) ligands in a simple one pot reaction. Although these ligands are formally dinucleating, the copper(II) ions are held far apart, as shown by the Xray structures of five copper(II) compounds obtained with these ligands. Consequentially, these copper(II) compounds behave magnetically mononuclear.