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The mol-ecular and crystal structures of a CO 2  2- -bridged dinuclear ruthenium complex is reported, namely, μ-carbonito-κ 2  C : O -bis-[bis(2,2'-bi-pyridine-κ 2  N , N ')carbon-ylruthenium(II)] bis-(hexa-fluorido-phosphate)-aceto-nitrile-diethyl ether (1/1/0.5), [Ru 2 (CO) 2 (C 10 H 8 N 2 ) 4 ( μ:κ  2 - C:O -CO 2 )](PF 6 ) 2 ·CH 3 CN·0.5C 4 H 10 O. The complex cation in the title compound consists of two {Ru(CO)(bpy) 2 } 2+ units (bpy = 2,2'-bi-pyridine) singly bridged by a μ:κ 2 - C : O carbonite anion, resulting in an unsymmetrical dinuclear structure. Some of the inter-atomic C⋯O distances involving the carbonyl ligands are shorter than the sum of the van der Waals radii. There are intra-molecular C-H⋯O and aromatic π-π contacts in the cationic complex. In the crystal, the cations are linked by pairs of C-H⋯F hydrogen bonds in addition to weak C-H⋯F inter-actions between the solvent mol-ecules and PF 6  - counter-anions. The equatorial F atoms of one of the PF 6  - anions are disordered over two sets of sites with an occupancy ratio of 0.908 (7):0.092 (7) while the central O atom of the diethyl ether solvent mol-ecule is disordered over an inversion centre.

Crystal structure of a dinuclear ruthenium(II) complex with a bent CO2 2− bridge

Crystal structure of a dinuclear ruthenium(II) complex with a bent CO₂ ²⁻ bridge