[1,1'-Bis(diphenyl-phosphino)ferrocene]carbon-yl[dihydro-bis(pyrazol-1-yl)borato]hydridoruthenium(II) acetone solvate.

In the title compound, [FeRu(C(17)H(14)P)(2)(C(6)H(8)BN(4))H(CO)]·C(3)H(6)O, the Ru(II) ion is coordinated in a distorted octa-hedral environment involving a hydride ligand, a carbonyl ligand and two bidentate ligands. Of the two bidentate ligands, the bulky 1,1'-bis-(diphenyl-phosphino)ferrocene (dppf) ligand chelates with a larger bite angle of 101.90†(2)°, whereas the bite angle of the [H(2)Bpz(2)](-) ligand (pz = pyrazol-yl) is 85.67†(7)°. The latter ligand creates an RuN(4)B six-membered ring with a boat conformation, which puckers towards the site of the small hydride ligand. The hydride ligand is cis with respect to the carbonyl ligand and trans to one of the P atoms of the dppf ligand. In the crystal structure, there are weak inter-molecular C-H⋯O hydrogen bonds between complex mol-ecules and acetone solvent mol-ecules.