| Abstrakt: |
Efficient syntheses of the cisand transisomers of [OsCl2(Me2SO)4] are reported. While a structural study of thetransisomer confirms the spectroscopically assigned all-S-bound Me2SO configuration, a crystallographic determination of the cisisomer reveals a previously unheralded all-S-bound Me2SO geometry, in contrast to the spectroscopically inferred configuration predominant in solution which has one O-bound ligand. Fortrans-[OsCl2(Me2SO)4], crystals are tetragonal, space group I 4/m, with a9·092(2), c11·212(3) Å, Z2, 566 unique reflections (34 parameters), converging at R0·026 and Rw0·032. For cis-[OsCl2(Me2SO)4], crystals are triclinic, space group P-1, with a8·193(2), b8·941(3), c13·837(3) Å, α 79·77(2), β 79·91(2), γ 65·03(2)°, Z2, 4152 unique reflections (173 parameters), converging at R0·021 and Rw0·018. |
