Chloridobis(1,10-phenanthroline-κ(2) N,N′)copper(II) tetra­kis­(nitrato-κ(2) O,O′)(1,10-phenanthroline-κ(2) N,N′)terbate(III)

The title complex salt, [CuCl(C(12)H(8)N(2))(2)][Tb(NO(3))(4)(C(12)H(8)N(2))], consists of discrete [CuCl(phen))(2)](+) cations and [Tb(NO(3))(4)(phen)](−) anions (phen is 1,10-phenanthroline). The [CuCl(phen))(2)](+) cation contains a five-coordinate Cu(2+) ion, ligated by two bidentate phen ligands and one Cl(−) ion, exhibiting a distorted CuN(4)Cl trigonal–bipyramidal geometry. In the [Tb(NO(3))(4)(phen)](−) anion, the Tb(3+) ion is coordinated by one chelating phen ligand and four chelating nitrates, forming a distorted TbN(2)O(8) bicapped dodeca­hedral configuration. The anions and cations are assembled into a three-dimensional network by weak C—H⋯Cl and C—H⋯O hydrogen bonds. There is also a significant π–π stacking inter­action, with a centroid–centroid distance of 3.635 (2) Å.