μ-Oxido-bis­[hydridotris(tri­methyl­phosphane-κP)iridium(III)](Ir—Ir) bis­(tetra­fluorido­borate) dihydrate

The title compound, [Ir(2)H(2)O(C(3)H(9)P)(6)](BF(4))(2)·2H(2)O, was isolated from the reaction between [Ir(COD)(PMe(3))(3)]BF(4) and H(2) in water (COD is cyclo­octa-1,5-diene). The asymmetric unit consists of one Ir(III) atom bonded to three PMe(3) groups, one hydride ligand and half an oxide ligand, in addition to a BF(4) (−) counter-ion and one water molecule of hydration. The single oxide ligand bridging two Ir(III) atoms is disordered across an inversion center with each O atom having a 50% site occupancy. Each Ir(III) atom has three PMe(3) groups occupying facial positions, with the half-occupancy O atoms, a hydride ligand and an Ir—Ir bond completing the coordination sphere. The Ir—Ir distance is 2.8614 (12) Å, comparable to other iridium(III) metal–metal bonds. Two water mol­ecules hydrogen bond to two BF(4) (−) anions in the unit cell.