Bis(propane-1,3-diamine)­disaccharinatonickel(II)

In the title complex, [Ni(C(7)H(4)NO(3)S)(2)(C(3)H(10)N(2))(2)] or [Ni(sac)(2)(pen)(2)] (sac = saccharinate or 1,1,3-trioxo-2,3-dihydro-1λ(6,2)-benzothia-zol-2-ide and pen = propane-1,3-diamine), the Ni(II) ion sits on an inversion center, being coordinated by two N atoms of the sac ligands, which occupy trans positions, and four N atoms of the bidentate pen ligands to define a distorted octa-hedral geometry. The pen ligands chelate the metal ion, forming a six-membered ring which adopts a half-chair conformation, while the sac ligands adopt the most common coordination mode. The crystal packing is stabilized by N-H⋯O hydrogen bonds, which form a one-dimensional network along [010]. It is also supported by an N-H⋯S hydrogen bond between the amine group of the pen ligand and the sulfonyl group of the sac ligand.