catena-Poly­[[silver(I)-μ-tris(2-amino­ethyl)­amine-κ⁴N,N′,N′′:N′′′] perchlorate]

The title compound, {[Ag(C₆H₁₈N₄)](ClO₄)}_n, is a polymeric silver(I) complex. The tris(2-amino­ethyl)­amine (tren) mol­ecule acts as tridentate ligand. Each Ag^I ion is four-coordinated by three N atoms from one tren ligand and one N atom from a symmetry-related tren ligand. The symmetry-related tren ligand acts as a bridge linking the Ag^I atoms together, forming a polymeric chain. Adjacent chains are linked via N—H...O hydrogen bonds to anions, forming a three-dimensional network.

catena-Poly­[[aquadicinnamatocadmium]-μ-1,4-di­aza­bi­cyclo­[2.2.2]­octane]

The title compound, [Cd(C₉H₈O₂)₂(C₆H₁₂N₂)(H₂O)]_n, forms a one-dimensional polymeric chain. Both cinnamate ligands are bidentate anions and the 1,4-diazbi­cyclo­[2.2.2]­octane (dabco) mol­ecule acts as an end-to-end bridging ligand. The Cd atom, located at a position of site symmetry m, has a slightly distorted pentagonal bipyramidal coordination environment consisting of two N atoms of dabco ligands, four cinnamate O atoms and one water ligand, with the dabco N atoms in the axial positions. The chains are cross-linked by hydrogen bonds involving the coordinated water mol­ecules, forming a two-dimensional network.

trans-Bis­[4-(4-methyl­phenyl)-3,5-di-2-pyridyl-4H-1,2,4-triazole]­diperchlorato-κ²O-copper(II)

In the title centrosymmetric mononuclear copper(II) compound, [Cu(ClO₄)₂(C₁₉H₁₅N₅)₂], the central Cu^II atom is coordinated by four N atoms from two 4-(4-methyl­phenyl)-3,5-di-2-pyridyl-4H-1,2,4-triazole ligands, and two O atoms from two perchlorate counter-ions. The coordination geometry is slightly distorted octahedral.

trans-Bis­[4-(4-methoxy­phenyl)-3,5-di-2-pyridyl-4H-1,2,4-triazole-κN¹]­di­thio­cyanato­cobalt(II)

In the title centrosymmetric mononuclear cobalt(II) compound, [Co(NCS)₂(C₁₉H₁₅N₅O)₂], the central Co^II atom is coordinated by four N atoms from two 4-(4-methoxy­phenyl)-3,5-di-2-pyridyl-4H-1,2,4-triazole ligands and two N atoms from two thio­cyanate counter-ions. The coordination geometry is slightly distorted octahedral.

N,N′-Bis(3-nitro­benzyl­idene)-trans-1,2-cyclo­hexa­nediamine

The title compound, C₂₀H₂₀N₄O₄, is a potentially N,N′-bidentate donor ligand with two chiral C atoms. In the crystal structure, the mol­ecules form centrosymmetric dimers via C—H...N hydrogen bonds.

4-(4-Ethoxy­phen­yl)-3,5-di-2-pyridyl-4H-1,2,4-triazole

In the title compound, C₂₀H₁₇N₅O, the two pyridyl rings form dihedral angles of 30.0 (1) and 21.0 (1)° with the triazole ring, and the dihedral angle between the triazole and benzene rings is 71.4 (1)°. The crystal packing is stabilized by C—H...N hydrogen bonds.