Abstract
The reaction of copper(II) oxalate and hexa-methyl-ene-tetra-mine in a deep eutectic solvent made of urea and choline chloride produced crystals of penta-amine-copper(II) dichloride-urea (1/1), [Cu(NH(3))(5)]Cl(2)·CO(NH(2))(2), which was characterized by single-crystal X-ray diffraction. The complex contains discrete penta-amine-copper(II) units in a square-based pyramidal geometry. The overall structure of the multi-component crystal is dictated by hydrogen bonding between urea mol-ecules and amine H atoms with chloride anions.