d10 Metal complexes assembled from isomeric benzenedicarboxylates and 3-(2-pyridyl)pyrazole showing 1D chain structures: syntheses, structures and luminescent properties

Five Cd(ii) coordination polymers based on 2,3′,5,5′-biphenyltetracarboxylic acid and N-donor coligands: syntheses, structures and fluorescent properties

Five Cd(ii) coordination polymers based on 2,3′,5,5′-biphenyltetracarboxylic acid and different bis(imidazole) ligands have been synthesized.

Aqua-(benzene-1,2-dicarboxyl-ato-κO)bis-[2-(1H-pyrazol-3-yl-κN)pyridine-κN]cadmium(II)

In the mononuclear title complex, [Cd(C(8)H(4)O(4))(C(8)H(7)N(3))(2)(H(2)O)], the Cd(II) atom is six-coordinated in a distorted octa-hedral geometry by four N atoms from two bidentate chelating 2-(1H-pyrazol-3-yl)pyridine ligands, one O atom from a benzene-1,2-dicarboxyl-ate ligand and one water mol-ecule. The mol-ecular structure features intra-molecular O-H⋯O and N-H⋯O hydrogen bonds. In the crystal structure, the complex mol-ecules are assembled into a two-dimensional supra-molecular layer parallel to (011) via O-H⋯O and N-H⋯O hydrogen bonds and π-π stacking inter-actions between the pyridyl and pyrazole rings [centroid-centroid distances = 3.544 (2) and 3.722 (3) Å].

Bis[2-(1H-pyrazol-3-yl-κN)pyridine-κN]dithio-cyanato-κN,κS-cadmium(II)

The mol-ecular structure of the mononuclear complex, [Cd(SCN)(2)(C(8)H(7)N(3))(2)], contains a Cd(II) atom in a distorted octa-hedral coordination defined by five N atoms from two bidentate chelate 2-(1H-pyrazol-3-yl)pyridine ligands and by one SCN(-) anion. The second SCN(-) anion provides its S atom for completion of the coordination sphere. The complex is linked to four others by N-H⋯N and N-H⋯S hydrogen-bonding inter-actions between the pyrazol N-H group and the terminal S and N atoms of neighbouring SCN(-) anions. This arrangement leads to the formation of sheets parallel to (100). Face-to-face π-π stacking inter-actions with shortest inter-planar distances of 3.805 (2) and 3.696 (2) Å help to consolidate the crystal packing.