Ethylenediammonium tetrakis({2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}nickel(II)) bis(perchlorate) dimethylformamide monosolvate

The title compound, (C(2)H(10)N(2))[Ni(C(16)H(14)N(2)O(2))](4)(ClO(4))(2)center dot C(3)H(7)NO, crystallizes with four Ni(salen) molecules {salen is 2,2'-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolate}, one ethylenediammonium cation (actually two half-cations, each located on a center of inversion), two perchlorate anions and one dimethylformamide solvent molecule in the asymmetric unit. Each Ni(II) cation in the Ni(salen) complex is four-coordinated by two imine N atoms and two phenolate O atoms from the tetradentate ligand. The Ni(salen) units form parallel slipped stacks with Ni center dot center dot center dot Ni separations of 3.4541 (4) and 3.6442 (6) angstrom. The crystal packing is stabilized by intermolecular hydrogen bonds between the ammonium H atoms and the perchlorate and salen O atoms, which generate a three-dimensional structure.