3,5-Dimethyl-1-(4-nitro­benz­yl)pyridinium bis­(benzene-1,2-dithiol­ato-κ²S,S′)nickelate(III)

The asymmetric unit of the title compound, (C₁₄H₁₅N₂O₂)[Ni(C₆H₄S₂)₂], contains one cation and two halves of two centrosymmetric crystallographically independent anions. In the anions, the Ni^III atoms are coordinated by four S atoms in a distorted square-planar geometry. In the cation, the dihedral angle between the pyridine and benzene rings is 88.66 (17)°. In the crystal, anions and cations inter­act through C—H...S and C—H...O hydrogen bonds.

N-Benzyl-N,N-dimethyl­octa­decan-1-aminium (2-thioxo-1,3-dithiole-4,5-dithiol­ato-κ²S⁴,S⁵)nickelate(III)

The asymmtric unit of the title compound, (C₂₇H₅₀N)[Ni(C₃S₅)₂], contains two N-benzyl-N,N-dimethyl­octa­decan-1-aminium cations, [BDA]⁺, and two [Ni(dmit)₂]⁻ anions (dmit = 2-thioxo-1,3-dithiole-4,5-dithiol­ate). The C₁₈ chains in both cations adopt almost ideal extended conformations. The Ni^III atoms are coordinated by two S,S′-bidentate ligands, generating NiS₄ square planes. Short Ni...S [3.734 (2) Å] and S...S contacts [3.5438 (15) Å] occur in the crystal structure; if these are considered to be bonding inter­actions, then infinite sheets of anions parallel to (111) arise.

catena-Poly[[[bis­(nitrato-κO)copper(II)]-bis­[μ-1,3-bis­(imidazol-1-yl)-5-methyl­benzene-κ²N³:N^3′]] dihydrate]

In the title complex, {[Cu(NO₃)₂(C₁₃H₁₂N₄)₂]·2H₂O}_n, the Cu^II atom is located on a crystallographic center of symmetry and adopts an N₄O₂ octa­hedral coordination geometry with four imidazole N atoms in the equatorial sites and two O atoms in the axial sites. The dihedral angles between the central benzene ring and the imidazole rings are 4.93 (11) and 46.08 (12)°. The 1,3-bis­(imidazol-1-yl)-5-methyl­benzene ligand is bis-monodentate, linking symmetry-related Cu^II atoms into sheets in the bc plane. These sheets are further bridged into a three-dimensional supra­molecular structure by O—H...O and C—H...O hydrogen bonds.