catena-Poly[[tris­(1H-benzimidazole-κN³)manganese(II)]-μ-maleato-κ²O,O′:κO′′]

In the title compound, [Mn(C₄H₂O₄)(C₇H₆N₂)₃]_n, maleate dianions bridge neighbouring Mn^II ions to form helical polymeric chains. The Mn ion assumes a distorted octa­hedral coordination geometry, formed by two maleate and three benzimidazole ligands. One maleate carboxyl group chelates to the Mn atom with longer Mn—O bond distances while the other carboxyl group coordinates in a monodentate manner to the Mn atom.

Tris(pyridine-κN)[salicylaldehyde (2-hydroxy­benzo­yl)hydrazonato-κ²N,O]nickel(II) pyridine sesquisolvate

In the title compound, [Ni(C₁₄H₁₀N₂O₃)(C₅H₅N)₃]·1.5C₅H₅N, the Ni^II ion is coordinated by one N and two O atoms from a Schiff base ligand and by the N atoms of three pyridine mol­ecules to form a distorted octa­hedral geometry.

4-(2-Hydroxy­benzyl­ideneamino)-3-(1H-1,2,4-triazol-1-ylmeth­yl)-1H-1,2,4-triazole-5(4H)-thione

In the title compound, C₁₂H₁₁N₇OS, the dihedral angles made by the thione-substituted triazole ring with the other triazole ring and the benzene ring are 71.56 (2) and 47.89 (3)°, respectively. Inter- and intra­molcular hydrogen-bond inter­actions stabilize the structure.