Poly[di-µ-thiocyanato-κN:S;κS:N-bis-[2-(1H-1,2,3-triazol-1-yl-κN)pyra-zine]cadmium(II)].

In the title two-dimensional coordination polymer, [Cd(NCS)(2)(C(6)H(5)N(5))(2)](n), the Cd(II) ion (site symmetry ) is coordinated by two N atoms from two 2-(1H-1,2,3-triazol-1-yl)pyrazine ligands and two N and two S atoms from four thio-cyanate anions. The N-Cd bond lengths range from 2.323 (2) to 2.3655 (19) Šand the S-Cd bond length is 2.7117 (7) Å. The associated cisoid angles vary from 84.99 (7) to 95.01 (7)°, indicating that the Cd(II) ion assumes a distorted octa-hedral geometry. In the complex, each thio-cyanate anion functions as a bridging ligand, linking adjacent Cd(II) ions with a separation of 6.4919 (6) Å, resulting in the formation of a two-dimensional sheet structure in the bc plane.

Dichlorido[2,2'-(1,10-phenanthrolin-2-ylimino)diethanol]cadmium(II).

In the title complex, [CdCl(2)(C(16)H(17)N(3)O(2))], the metal atom exhibits a distorted trigonal-bipyramidal coordination geometry. O-H⋯O and O-H⋯Cl hydrogen bonds involving hydr-oxy groups and one of coordinated Cl atoms link complexes in the crystal packing. There is a π-π stacking inter-action between adjacent 1,10-phenanthroline rings, with a distance of 3.675 (2) Šbetween the centroids of the pyridine and benzene rings.

2,9-Bis(4-pyridylmeth-oxy)-1,10-phenanthroline.

In the title mol-ecule, C(24)H(18)N(4)O(2), the dihedral angles between the mean plane of the phenanthroline ring system and the pyridine rings are 82.52 (5) and 71.58 (4)°. The dihedral angle between the two pyridine ring planes is 53.54 (6)°. In the crystal structure, there are π-π stacking inter-actions between 1,10-phenanthroline rings, with centroid-centroid distances of 3.6101 (11) and 3.5864 (11) Å.

Bis[2-(1H-1,2,4-triazol-1-yl-κN)-1,10-phenanthroline-κN,N']zinc(II) bis-(perchlorate).

In the title complex, [Zn(C(14)H(9)N(5))(2)](ClO(4))(2), 2-(1H-1,2,4-triazol-1-yl)-1,10-phenanthroline functions as a tridentate ligand and the Zn(II) ion assumes a distorted octa-hedral ZnN(6) coordination geometry. There is a weak π-π stacking inter-action between symmetry-related triazolyl rings with a centroid-centroid distance of 3.802 (4) Šand a perpendicular distance of 3.413 Šbetween the rings.

Chlorido[2,2'-(oxydimethyl-ene)-dipyridine]copper(II) perchlorate-aqua-chlorido[2,2'-(oxydimethyl-ene)-dipyridine]copper(II) perchlorate (1/1).

The asymmetric unit of the title compound, [CuCl(C(12)H(12)N(2)O)][CuCl(C(12)H(12)N(2)O)(H(2)O)](ClO(4))(2), contains two different discrete cations. In one cation, the Cu(II) ion is coordinated in a slightly distorted square-planar geometry, while in the other the Cu(II) ion is in a slightly distorted square-pyramidal environment. In the crystal structure, there are O-H⋯O hydrogen bonds between coordinated water mol-ecules and perchlorate anions. Both types of cations are linked into one-dimensional chains along the b axis by weak electrostatic Cu⋯Cl inter-actions, with Cu⋯Cl distances of 2.8088 (16) and 3.2074 (17) Å.

catena-Poly[[bis-[2-(1H-1,2,4-triazol-1-yl-κN)pyrazine]cadmium(II)]-di-µ-thio-cyanato-κS:N;κN:S].

The title compound, [Cd(NCS)(2)(C(6)H(5)N(5))(2)](n), is a coordination polymer with the Cd(II) centre located on a twofold rotation axis. The Cd(II) centre assumes a distorted octa-hedral geometry. The thio-cyanate anions function as bridging ligands between the Cd(II) centres, leading to a chain-like arrangement expanding along [001].