Bis[2-(1H-benzotriazol-1-yl)-1H-benz­imidazol-1-ido]diethano­lcadmium

In the title complex, [Cd(C₁₃H₈N₅)₂(C₂H₅OH)₂], the Cd^II cation is located on an inversion center and coordinated by two deprotonated 2-(1H-benzotriazol-1-yl)-1H-benzimid­azol-1-ide (L) ligands and two ethanol mol­ecules in a distorted N₄O₂ octa­hedral geometry. In the L ligand, the dihedral angle between benzoimidazole and benzotriazole ring systems is 10.8 (3)°. In the crystal, the complex mol­ecules are connected by O—H...N hydrogen bonds; inter­molecular π–π stacking is also observed [centroid–centroid distances of 3.668 (5) Å between triazole and benzene rings and 3.780 (5) Å between imidazole rings].

1,3-Dimethyl-1H-1,2,3-benzotriazol-3-ium tetra­chloridoferrate(III)

The asymmetric unit of the title salt, (C₈H₁₀N₃)[FeCl₄], contains one 1,3-dimethyl-1H-1,2,3-benzotriazol-3-ium cation and one tetra­chloridoferrate anion. The Fe^III atom in the anion is tetra­hedrally coordinated by four Cl atoms. In the crystal, inter­actions are observed between the Cl atoms and the triazolium ring [Cl...centroid distances = 3.587 (3) and 3.866 (3) Å].

(3,3′-{(1E,1′E)-1,1′-[Ethane-1,2-diylbis(azan-1-yl-1-yl­idene-κN)]bis­(ethan-1-yl-1-yl­idene)}di­pyrazine 1-oxide-κN⁴)bis­(nitrato-κO)nickel(II) monohydrate

In the title complex, [Ni(NO₃)₂(C₁₄H₁₆N₆O₂)]·H₂O, the Ni^II atom, lying on a twofold rotation axis, is coordinated by a tetra­dentate 3,3′-{(1E,1′E)-1,1′-[ethane-1,2-diylbis(azan-1-yl-1-yl­idene)]bis­(ethan-1-yl-1-yl­idene)}di­pyrazine 1-oxide ligand and two mutually trans monodentate nitrate anions in a distorted o­cta­hedral geometry. The lattice water mol­ecule is located on a twofold rotation axis. The complex mol­ecules are linked by the water mol­ecules through O—H...O hydrogen bonds into a chain along [001]. Further C—H...O hydrogen bonds lead to the formation of a three-dimensional network.