Crystal structure of [1,3-bis­(2,4,6-tri­methyl­phen­yl)imidazolidin-2-yl­idene]di­chlorido­{2-[1-(di­methyl­amino)­eth­yl]benzyl­idene}ruthenium including an unknown solvate

The title compound, [RuCl(2)(C(21)H(26)N(2))(C(11)H(15)N)], is an example of a new generation of N,N-dialkyl metallocomplex ruthenium catalysts with an N→Ru coordination bond as part of a six-membered chelate ring. The Ru atom has an Addison τ parameter of 0.234, which indicates a geometry inter­mediate between square-based pyramidal and trigonal–bipyramidal. The complex shows the usual trans arrangement of the two chloride ligands, with Ru—Cl bond lengths of 2.3397 (8) and 2.3476 (8) Å, and a Cl—Ru— Cl angle of 157.47 (3)°. The crystal structure features C—H⋯Cl, C—H⋯π and π–π stacking inter­actions. The solvent mol­ecules were found to be highly disordered and their contribution to the scattering was removed with the SQUEEZE procedure in PLATON [Spek (2015). Acta Cryst. C71, 9–18], which indicated a solvent cavity of volume 1096 Å(3) containing approximately 419 electrons. These solvent mol­ecules are not considered in the given chemical formula and other crystal data.