Trichlorido(5,5'-dimethyl-2,2'-bipyridine-κ(2) N,N')(dimethyl-formamide-κO)indium(III) hemihydrate.

The asymmetric unit of the title compound, [InCl3(C12H12N2)(C3H7NO)]·0.5H2O, contains two independent In(III) complex mol-ecules with similar structures and one lattice water mol-ecule. In each complex mol-ecule, the In(III) atom is six-coordinated in a distorted octa-hedral geometry, formed by two N atoms from the chelating 5,5'-dimethyl-2,2'-bipyridine ligand, one O atom from a dimethyl-formamide and three facial Cl atoms. In the crystal, the lattice water mol-ecule is linked to the complex mol-ecules via O-H⋯Cl hydrogen bonds. Further weak C-H⋯Cl and C-H⋯O hydrogen bonds result in the formation of a three-dimensional structure.

Dibromido(6-methyl-2,2'-bipyridine-κ(2) N,N')cobalt(II).

In the mol-ecule of the title compound, [CoBr2(C11H10N2)], the Co(II) atom is four-coordinated in a distorted tetra-hedral geometry by two N atoms from a chelating 6-methyl-2,2'-bipyridine ligand and two terminal Br atoms. In the crystal, π-π stacking inter-actions between the pyridine rings along the a-axis direction [centroid-centroid distance = 3.761 (7) Å] and C-H⋯Br hydrogen bonds in the bc plane together generate the three-dimensional packing.

Di-µ-bromido-bis-[bromido(4,7-diphenyl-1,10-phenanthroline-κ(2) N,N')cadmium].

The title compound, [Cd2Br4(C24H16N2)2], consists of a centrosymmetric dimeric unit in which two Br atoms bridge two Cd(II) atoms, forming a four-membered ring. A terminal Br atom and a bidentate chelating 4,7-diphenyl-1,10-phenanthroline ligand complete a square-pyramidal geometry for the Cd(II) atom. In the crystal, C-H⋯Br hydrogen bonds and π-π contacts between the pyridine and phenyl rings [centroid-centroid distances = 3.704 (4) and 3.715 (4) Å] lead to a three-dimensional supra-molecular structure.

catena-Poly[[(4,4'-dimethyl-2,2'-bipyridine-κ(2) N,N')cadmium]-di-µ-bromido].

In the crystal of the title polymeric compound, [CdBr2(C12H12N2)] n , the Cd(II) cation is located on a twofold rotation axis and is six-coordinated in a distorted octa-hedral geometry formed by two N atoms from the 4,4'-dimethyl-2,2'-bipyridine ligand and by four bridging Br(-) anions. The bridging function of the Br(-) anions leads to a polymeric chain running along the c axis. Weak C-H⋯π inter-actions observed between adjacent chains are effective in the stabilization of the three-dimensional packing.

(4,4'-Dimethyl-2,2'-bipyridine-κ(2) N,N')(dimethyl-formamide-κO)diiodido-cadmium.

In the title compound, [CdI2(C12H12N2)(C3H7NO)], the Cd(II) cation is five-coordinated in a distorted trigonal-bipyramidal configuration by two N atoms from a 4,4'-dimethyl-2,2'-bipyridine ligand, one O atom from a dimethyl-formamide ligand and two I(-) anions. π-π stacking between pyridine rings of adjacent mol-ecules [centroid-centroid distance = 3.666 (3) and 3.709 (4) Å] stabilizes the three-dimensional structure.

Dibromido(6,6'-dimethyl-2,2'-bipyridine-κ(2)N,N')cobalt(II).

In the title compound, [CoBr(2)(C(12)H(12)N(2))], the Co(II) atom is four-coordinated in a distorted tetra-hedral geometry by two N atoms from a 6,6'-dimethyl-2,2'-bipyridine ligand and by two terminal Br atoms. Inter-molecular C-H⋯Br hydrogen bonds and π-π stacking between the pyridine rings in the bc plane [centroid-centroid distance = 3.725 (3) Å] are present in the crystal structure.

Dibromido(2,9-dimethyl-1,10-phenanthroline-κ(2)N,N')cobalt(II) acetonitrile monosolvate.

In the title compound, [CoBr(2)(C(14)H(12)N(2))]·CH(3)CN, the Co(II) atom is four-coordinated in a distorted tetra-hedral geometry by two N atoms from a chelating 2,9-dimethyl-1,10-phenanthroline ligand and two terminal Br atoms. In the crystal, π-π contacts between the pyridine and benzene rings [centroid-centroid distances = 3.828 (5), 3.782 (5), 3.880 (5) and 3.646 (5) Å] stabilize the structure.