Dichlorido(2,9-dimethyl-1,10-phenanthroline-κN,N')copper(II)

Dichlorido(2,9-dimethyl-1,10-phenanthroline-κ(2)N,N')mercury(II)

The title compound, [HgCl₂(C₁₄H₁₂N₂)], consists of one 2,9-dimethyl-1,10-phenanthroline (dmphen) ligand chelating the Hg^II ion and two chloride ligands coordinating to the Hg^II ion, forming a distorted tetra­hedral environment. The dmphen ligand is nearly planar (r.m.s. deviation = 0.0225 Å). The dihedral angle between the normal to the plane defined by the Hg^II atom and the two Cl atoms and the normal to the plane of the dmphen ring is 81.8 (1)°.

(2,9-Dimethyl-1,10-phenanthroline-κ(2)N,N')bis-(thio-cyanato-κS)mercury(II)

The asymmetric unit of the title compound, [Hg(SCN)₂(C₁₄H₁₂N₂)], contains two complex mol­ecules in which the Hg^II atoms are both four-coordinated in a distorted tetra­hedral configuration by two N atoms from a chelating 2,9-dimethyl-1,10-phenanthroline ligand and by two S atoms from two thio­cyanate anions. The 1,10-phenanthroline ligand is slightly folded for one complex, the dihedral angle between the pyridine planes being 5.3 (1)°. In contrast it is nearly planar [0.5 (1)°] as it complexes with the other Hg^II atom. The thio­cyanate ligands are virtually linear and the S atom is bonded to Hg^II with N⋯S—Hg angles ranging from 99.3 (1) to 103.5 (1)°. Despite the presence of six aromatic rings in the asymmetric unit, there are no significant inter­molecular π–π contacts between phenanthroline ligands as the centroid–centroid distance of the closest contact between six-membered rings is 4.11 (1) A°.

Dichlorido{2-[(3,4-dimethyl-phen-yl)imino-meth-yl]pyridine-κN,N'}copper(II)

In the title complex, [CuCl₂(C₁₄H₁₄N₂)], the Cu^II atom exhibits a very distorted tetra­hedral coordination geometry involving two chloride ions and two N-atom donors from the Schiff base ligand. The range for the six bond angles about the Cu²⁺ cation is 81.49 (11)–145.95 (9)°. The chelate ring including the Cu^II atom is approximately planar, with a maximum deviation of 0.039 (4) Å for one of the C atoms; this plane forms a dihedral angle of 46.69 (9)° with the CuCl₂ plane.

Dibromido(2,9-dimethyl-1,10-phenanthroline-κ2N,N′)cadmium

In the title complex, [CdBr₂(C₁₄H₁₂N₂)], the Cd^II ion is tetra­coordinated by two N atoms of the bidentate 2,9-dimethyl-1,10-phenanthroline ligand and two bromide ions in a substanti­ally distorted CdN₂Br₂ tetra­hedral geometry. In the crystal, inversion dimers linked by pairs of weak C—H⋯Br bonds generate R₂²(14) loops. Aromatic π–π stacking [shortest centroid–centroid separation = 3.633 (2) Å] inter­actions occur within, and also link, the dimers into chains propagating parallel to [100].

(2,9-Dimethyl-1,10-phenanthroline-κN,N')diiodidocadmium

In the title compound, [CdI₂(C₁₄H₁₂N₂)], the mol­ecule sits on a crystallographic twofold axis. The coordination sphere of the Cd^II atom is built of two symmetry-equivalent N atoms of one 2,9-dimethyl-1,10-phenanthroline (dmphen) ligand and two symmetry-equivalent I atoms, thus forming a distorted tetra­hedral geometry. Inversion-related mol­ecules inter­act along the c-axis direction by π–π stacking inter­actions between the phenanthroline ring systems, with centroid–centroid distances of 3.707 (9) and 3.597 (10) Å.