Low-dimensional compounds containing cyanido groups. XXIX. Crystal structures, spectral and magnetic properties of five [Cu(L)2X]C(CN)3 complexes (L = 2,2′-bipyridine or 1,10-phenanthroline; X = Cl−, Br− or CH3COO−)

Five new ionic [Cu(L)2X]C(CN)3 (L = 2,2′-bipyridine (bpy) or 1,10-phenanthroline (phen), X = Cl−, Br− or CH3COO−) complexes: [Cu(bpy)2Cl]C(CN)3 (1), [Cu(phen)2Cl]C(CN)3·H2O (2), [Cu(bpy)2Br]C(CN)3·H2O (3), [Cu(phen)2Br]C(CN)3·0.5H2O·0.5EtOH (4) and [Cu(phen)2Br0.7(CH3COO)0.3]C(CN)3·0.5H2O (5), have been synthesized and characterized by IR and UV–Vis spectroscopy. X-ray structural analysis revealed that the structures of all discussed compounds consist of [Cu(L)2X]+ complex cations and uncoordinated C(CN) 3 − counteranions; water molecules were found in 2, 3, 4 and 5; a molecule of ethanol was found in 4, too. The shapes of coordination polyhedra around the copper atoms, which are pentacoordinated by two bidentate bpy or phen molecules and Cl−, Br− or CH3COO− ligands monodentately coordinated in the equatorial plane, are distorted trigonal bipyramids. Structures of 1–5 are stabilized by weak π–π interactions and by hydrogen bonds. Magnetic properties of complexes 1–4 are characterized by the presence of weak antiferromagnetic exchange couplings.