The crystal structures of the title compounds, [Rh(CS2·NEt2)3], (I), and [As(CS2·NEt2)3], (II) have been determined by-X-ray diffraction from diffractometer data, and refined by least-squares to R 0.080 (I) and 0.058 (II) for 1 582 and 1 877 reflections. Crystals are monoclinic, space group P21/a, with Z = 4 in unit cells of dimensions: (I) a = 18.07(3), b = 8.276(3), c = 15.80(1) Å, β = 96.35(4)°; (II) a = 18.543(4), b = 8.387(2), c = 15.870(3) Å, β = 101.05(2)°. The compounds are isomorphous also with the manganese(III) derivative; whereas the MS6 core in (I) is quite close to D3 symmetry (mean Rh-S 2.368 Å), that of (II) is grossly distorted (as previously described) toward C3 symmetry (mean As-S 2.84 and 2.349 Å). In (II), the usual equality in the ligand C-S distances is destroyed as a result (mean C-S 1.68 and 1.76 Å) and the surrounding angular geometry of the ligand also distorted. The arsenic has a close hydrogen contact (3.2 Å) along the pseudo threefold axis from a neighbouring molecule.
|Number of pages||5|
|Journal||Journal of the Chemical Society, Dalton Transactions|
|Publication status||Published - 1975|