trans-Tetrachlorobis(triphenylphosphine-P)rhenium(IV)-mer-trans-Trichlorooxobis(triphenylphosphine-P)rhenium(V) (0.86/0.14)

trans-Tetrachlorobis(triphenylphosphine)rhenium(IV), (1), is isomorphous with the triclinic polymorph of mer-trans-trichlorooxobis(triphenylphosphine)rhenium(V), (2) [Lebuis & Beauchamp (1993). Can. J. Chem. 71, 441-449]. The sample of (1) has been partially oxidized (14-25%) to (2) by aerial oxidation, resulting in the title compound, [ReCl₄(C₁₈H₁₅P)₂]_0.86. [ReCl₃O(C₁₈H₁₅P)₂]_0.14. In the crystal lattice, the oxo ligand is located primarily at one of six possible sites. The molecules have trans-octahedral coordination geometry, with Re-P distances in the range 2.564 (1)-2.580 (1) Å, having a mean value of 2.571 (7) Å, and Re-Cl distances in the range 2.291 (3)-2.339 (1) Å.

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