Novel hydrogen-bonded and π–π interaction networks generated from the reaction of copper(II) chloride hydrates with heterocyclic diimines (2,2′-bipyridine, 1,10-phenanthroline) and bidentate diamine (ethylenediamine)

Abstract The reaction of copper dichloride dihydrate, heterocyclic diimine (bipy, phen) and bidentate diamine (en) ligands under mild conditions affords two novel supramolecular complexes containing Cu II N 4 Cl chromophores, [Cu(en)(bipy)Cl][OH] · (H 2 O) 3 ( 1 ) (en=ethylenediamine, bipy=2,2 ′ -bipyridine) and [Cu(phen) 2 Cl][OH] · (CH 3 OH) 2  · (H 2 O) 6 ( 2 ) (phen=1,10-phenanthroline). Complex 1 involves a Cu II N 4 Cl chromophore with a regular square based pyramidal stereochemistry, while complex 2 involves a regular trigonal bipyramidal one. To our knowledge, 1 is the first example of a Cu II N 4 X complex generated from mixed ligands. Both of the two compounds were constituted through hydrogen bonding and π–π interactions between the heterocyclic rings. The magnetic properties of 2 were studied in the temperature range 5–300 K. The results reveal the occurrence of a weak antiferromagnetic coupling with J =−1.9 cm −1 .