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

In the title complex, [Ni(C₇H₄NO₃S)₂(C₃H₁₀N₂)₂] or [Ni(sac)₂(pen)₂] (sac = saccharinate or 1,1,3-trioxo-2,3-dihydro-1λ^6,2-benzothia­zol-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 octa­hedral 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.

2-Amino-4-nitro­phenol–1-(2,4,6-trihy­droxy­phen­yl)ethanone (1/1)

In the title compound, C₆H₆N₂O₃·C₈H₈O₄, the 2-amino-4-nitro­phenol (ANP) and 1-(2,4,6-trihy­droxy­phen­yl)ethanone (THA) mol­ecules are both nearly planar, with r.m.s. deviations of 0.0630 and 0.0313 Å, respectively. The angle between the least-squares planes of THA and ANP is 48.99 (2)°. In THA, an intra­molecular O—H...O hydrogen bond generates an S(6) ring motif. In the crystal, N—H...O, O—H...O and O—H...N hydrogen bonds lead to the formation of a three-dimensional network. There are also inter­molecular π–π inter­actions between the benzene rings of ANP–ANP and of THA–THA mol­ecules, with centroid–centroid distances of 3.5313 (14) and 3.8440 (16) Å, respectively. Weak C—O...π and N—O...π inter­actions also occur.