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

Abstract

The molecular and crystal structures of a CO2 2−-bridged dinuclear ruthenium complex is reported, namely, μ-carbonito-κ2 C:O-bis[bis(2,2′-bipyridine-κ2 N,N′)carbonylruthenium(II)] bis(hexafluoridophosphate)–acetonitrile–diethyl ether (1/1/0.5), [Ru2(CO)2(C10H8N2)4(μ:κ 2-C:O-CO2)](PF6)2·CH3CN·0.5C4H10O. The complex cation in the title compound consists of two {Ru(CO)(bpy)2}2+ units (bpy = 2,2′-bipyridine) singly bridged by a μ:κ2-C:O carbonite anion, resulting in an unsymmetrical dinuclear structure. Some of the interatomic C...O distances involving the carbonyl ligands are shorter than the sum of the van der Waals radii. There are intramolecular 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 interactions between the solvent molecules and PF6 − counter-anions. The equatorial F atoms of one of the PF6 − 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 molecule is disordered over an inversion centre.