(Acetonitrile){2,6-bis­[1-(2-ethyl-6-methyl­phenyl­imino)­ethyl]­pyridine}­dichloro­ruthenium(II) dichloro­methane hemisolvate: a chain of edge-fused R₆⁶(24) rings

In the title compound, [RuCl₂(C₂H₃N)(C₂₇H₃₁N₃)]·0.5CH₂Cl₂, the Ru^II ion is six-coordinated in a distorted octa­hedral arrangement, with the two Cl atoms located in the apical positions, and the pyridine (py) N atom, the two imino N atoms and the acetonitrile N atom located in the basal plane. The dichloromethane solvent mol­ecule lies on a twofold axis. The two equatorial Ru-N_imino distances are almost equal (mean 2.089 Å) and are substantially longer than the equatorial Ru-N_py bond [1.914 (4) Å]. It is observed that the N_imino-M-N_py bond angle for the five-membered chelate rings of pyridine-2,6-diimine complexes is inversely related to the magnitude of the M-N_py bond. The title structure is stabilized by intra- and inter­molecular C-H...Cl hydrogen bonds. The inter­molecular hydrogen bonds form an R₆⁶(24) ring and a chain of edge-fused rings running parallel to the [001] direction.

(2,6-Bis{1-[4-(dimethyl­amino)phenyl­imino]eth­yl}­pyridine)­dichlorido­(tri­phenyl­phosphine-κP)ruthenium(II): a zigzag chain of fused centrosymmetric R²₂(12) rings

The title compound, [RuCl₂(C₂₅H₂₉N₅)(C₁₈H₁₅P)], a transfer hydrogenation catalyst, is supported by an N,N′,N′′-tridentate pyridine-bridged ligand and triphenyl­phosphine. The Ru^II centre is six-coordinated in a distorted octa­hedral arrangement, with the two Cl atoms located in the axial positions, and the pyridine (py) N atom, the two imino N atoms and the triphenyl­phosphine P atom located in the equatorial plane. The two equatorial Ru—N_imino distances (mean 2.093 Å) are substantially longer than the equatorial Ru—N_py bond [1.954 (4) Å]. It is observed that the N_imino—M—N_py bond angle for the five-membered chelate rings of 2,6-bis(imino)pyridine-based complexes is inversely related to the magnitude of the M—N_py bond. The title structure is stabilized by intra- and inter­molecular C—H...Cl hydrogen bonds, as well as by intra­molecular π–π stacking inter­actions between the aromatic rings belonging to the triphenyl­phosphine ligand and the dimethyl­amino­phenyl fragment. The inter­molecular hydrogen bonds form an R₂²(12) ring and a zigzag chain of fused centrosymmetric rings running parallel to the [100] direction.

(Acetonitrile){2,6-bis­[1-(2,4,6-tri­methyl­phenyl­imino)­ethyl]­pyridine}­dichlorido­ruthenium(II) dichloro­methane solvate

In the title compound, [RuCl₂(C₂H₃N)(C₂₇H₃₁N₃)]·CH₂Cl₂, the Ru^II ion is six-coordinated in a distorted octa­hedral arrangement, with the two Cl atoms located in the apical positions, and the pyridine (py) N atom, the two imino N atoms and the acetonitrile N atom located in the basal plane. The two equatorial Ru—N_imino distances are almost equal (mean 2.087 Å) and are substanti­ally longer than the equatorial Ru—N_py bond [1.921 (4) Å]. It is observed that the N_imino—M—N_py angle for the five-membered chelate rings of pyridine-2,6-diimine complexes is inversely related to the magnitude of the M—N_py bond. The title structure is stabilized by intra- and inter­molecular C—H...Cl hydrogen bonds, as well as by van der Waals inter­actions.