Dichlorido(2-chloro-9-mesityl-1,10-phenanthroline-κN,N')cobalt(II) dichloro-methane hemisolvate.

The title compound, [CoCl(2)(C(21)H(17)ClN(2))]·0.5CH(2)Cl(2), crystallizes from dichloro-methane as a 2:1 solvate CoCl(2)L·CH(2)Cl(2) (L is 2-chloro-9-mesityl-1,10-phenanthroline). There are two independent CoCl(2)L mol-ecules in the asymmetric unit and both mol-ecules have similar conformations. They are connected by a weak C-H⋯π inter-action involving the mesityl ring. The cobalt center is four-coordinated by the two N-atom donors of the bidentate ligand and two chloride ions in a distorted tetra-hedral geometry. The packing of the mol-ecules is stabilized by weak slipped π-π stacking inter-actions between symmetry-related phenanthroline groups.