Chloridotris(pentafluorobenzenethiolato-κS)[tris(4-fluorophenyl)phosphine-κP]osmium(IV)
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چکیده
The title complex, [Os(C(6)F(5)S)(3)Cl(C(18)H(12)F(3)P)], displays a trigonal-bipyramidal Os(IV) coordination geometry with the S atoms of three thiol-ate ligands occupying the equatorial positions. The thiol-ate penta-fluoro-phenyl substituents are all placed above the equatorial plane, forming a claw-like cavity which accommodates the chloride ligand with a normal Os-Cl bond length. The phosphine ligand trans to the chloride ligand reveals a short Os-P bond length compared to other chloride-phosphine Os(IV) complexes (average = 2.40 Å). This strong bonding indicates that the inductive effect of the F atoms in the phosphine does not affect significantly its basicity, compared to triphenyl-phosphine. This feature is also consistent with the known poor trans influence of Cl(-). The crystal packing involves π-π contacts between inversion-related thiol-ate C(6)F(5) rings, with a centroid-centroid separation of 3.659 (8) Å.
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