Dichlorido[1-(2-chloroethyl)-3-(pyridin-4-ylmethyl-<i>κ</i>N)urea](</i>η</i>⁶-hexamethylbenzene)ruthenium(II) chloroform monosolvate

The Ru^II atom in the title compound, [RuCl₂(C₁₂H₁₈)(C₉H₁₂ClN₃O)]•CHCl₃, exhibits a typical piano-stool coordination, defined by a hexamethylbenzene ligand, two chloride ligands and a pyridylurea ligand coordinated through the pyridine N atom. In the crystal, a dimeric structure is observed due to two strong N-H...Cl interactions between the NH groups of urea and the two chloride ligands of neighbouring molecules. In addition, the C=O group of the urea moiety interacts with the solvent molecule through weak C-H...O interactions.