Mutual structure-directing effects of a non-interpenetrated square grid coordination polymer and its complementary complex anion net

The cationic grid, {[Cu(1,2-bis(4-pyridylethane)2)(H2O)2]2+]n, and the complex anion, Cu(4-pySO3)4(H2O)2]^2–, neither of which have been previously observed, form a perfectly complementary supramolecular pair with respect to charge and H-bonding, to mutually stabilize each others formation.