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In the title compound, [RuCl2(C2H3N)(C27H31N3)]·0.5CH2Cl2, the RuII 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-Nimino distances are almost equal (mean 2.089 Å) and are substantially longer than the equatorial Ru-Npy bond [1.914 (4) Å]. It is observed that the Nimino-M-Npy bond angle for the five-membered chelate rings of pyridine-2,6-diimine complexes is inversely related to the magnitude of the M-Npy 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.

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The title complex, [RhBr(C8H12)(C21H8N2F10)], has a slightly distorted pseudo-square-planar geometry. The whole molecule has an approximate mirror symmetry, with the mirror plane passing through the mid-points of the two alkene bonds of the cycloocta-1,5-diene (COD) ligand. The average Rh—C(COD) distance is inversely related to the magnitude of the Rh—C(benzimidazole) distance in this type of compound. The mol­ecules are stacked in columns running along the a axis. The crystal structure contains two types of inter­molecular C—H...F inter­actions, as well as two weak π–π stacking inter­actions.

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The title compound, [RuCl2(C25H29N5)(C18H15P)], a transfer hydrogenation catalyst, is supported by an N,N′,N′′-tridentate pyridine-bridged ligand and triphenyl­phosphine. The RuII 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—Nimino distances (mean 2.093 Å) are substantially longer than the equatorial Ru—Npy bond [1.954 (4) Å]. It is observed that the NiminoM—Npy 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—Npy 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.

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The title complex, [PdCl2(C21H26N2)(C18H15P)], shows slightly distorted square-planar coordination around the PdII metal centre. The Pd—C bond distance between the N-heterocyclic ligand and the metal atom is 2.028 (5) Å. The dihedral angle between the two trimethyl­phenyl ring planes is 36.9 (2)°.

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In the title compound, [RuCl2(C2H3N)(C27H31N3)]·CH2Cl2, the RuII 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—Nimino distances are almost equal (mean 2.087 Å) and are substanti­ally longer than the equatorial Ru—Npy bond [1.921 (4) Å]. It is observed that the NiminoM—Npy angle for the five-membered chelate rings of pyridine-2,6-diimine complexes is inversely related to the magnitude of the M—Npy bond. The title structure is stabilized by intra- and inter­molecular C—H...Cl hydrogen bonds, as well as by van der Waals inter­actions.
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