Crystal structure of acetonitrile[η6-1-methyl-4-(1-methylethyl)benzene][1-(pyrimidin-2-yl)-3H-indol-1-ium-2-yl-κ2N,C]ruthenium(II) bis(hexafluoridoantimonate)

In the title compound, [Ru(C10H14)(C12H9N3)(CH3CN)][SbF6]2, the ruthenium(II) cation is η6-coordinated by the para-cymene ligand with a Ru–centroid(η6-benzene) distance of 1.746 (2) Å. Furthermore, ruthenium coordinations to the C and N atoms of the pyrimidyl indole ligand are found to be 1.986 (4) and 2.082 (3) Å, respectively. The typical piano-stool coordination environment is saturated with an acetonitrile solvent molecule with a Ru—N distance of 2.044 (3) Å. The indolyl ligand is protonated at the C3 position with the N=C imine bond length appropriate to that of related 3H-indole-based complexes. In the crystal, the complex cation is linked to the SbF6− ions through weak C—H...F hydrogen bonds.