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In the centrosymmetric trinuclear cation of the title compound, [Co3(C4H8N4)6(H2O)6](C10H6O6S2)Cl4, the three CoII atoms are bridged by six triazole molecules via the N atoms in the 1,2-positions. The central CoII atom, lying on an inversion center, is coordinated by six triazole N atoms while the terminal CoII atoms are coordinated by three triazole N atoms and three water O atoms in a distorted octahedral geometry. The naphthalenedisulfonate anion is also centrosymmetric. The four chloride counter anions are half-occupied; the H atoms of the amino groups show an occupancy of 2/3. O—H...Cl, O—H...O and N—H...O hydrogen bonds link the complex cations and the chloride and naphthalene-1,5-disulfonate anions.

The MnIII ion in the title complex, [Mn(C15H10N3O)2]ClO4·H2O, is coordinated meridionally by six N atoms from two tridentate N-(8-quinolyl)pyridine-2-carboxamidate ligands, yielding a distorted octahedral coordination geometry. The two ligands are nearly planar and their mean planes are almost perpendicular, with a dihedral angle of 86.7 (2)°.

In the title compound, [Mn2O(C18H18ClN4)2](PF6)2, the Mn atom is chelated by a tetradentate ligand via four N atoms, and further bonded to one chloride ion and one bridging oxide, to give a centrosymmetric cation and distorted octahedral coordination geometry.

In the asymmetric unit of the title compound, [Mn(C2O4)(C3H10N2)2]Cl·H2O, there are two independent MnIII complexes, two Cl− anions and two uncoordinated water molecules. Each MnIII atom is hexacoordinated by four N atoms from two propane-1,3-diamine ligands and two O atoms from one oxalate ligand, resulting in a slightly distorted octahedral MnO2N4 geometry. Mn—O and Mn—N bond lengths are in the ranges 1.969 (2)–2.020 (3) and 2.068 (3)–2.113 (4) Å, respectively. There are weak intermolecular O—H...O, O—H...Cl, N—H...O and N—H...Cl hydrogen bonds with D...A distances in the range 2.831 (4)–3.423 (3) Å.

In the title compound, [Fe2(C16H12Br2N2O2)2O], the complete molecule is generated by twofold symmetry, with the bridging O atom, which links the iron centres, lying on the roatation rotation axis. The Fe(III) ion is chelated by the N,N,O,O-tetradentate Schiff base dianion, resulting in an FeN2O3 square-based pyramid, with the two N atoms in the basal plane.

In the title compound, [Pd(C8H4O4)(C7H6N2)2]n, the Pd atom is tetracoordinated by two carboxylate O atoms from two benzene-1,4-dicarboxylate (bdc) dianions and two N atoms from two benzimidazole ligands, resulting in a slightly distorted tetrahedral PdO2N2 geometry. The bdc ligand acts as a bridge, linking the Pd atoms into a chain. Inter-chain N—H...O hydrogen bonds help to stabilize the crystal structure.