Structure cristalline et moléculaire du cyclopentadiényle dicarbonyle dioxyde de soufre manganèse MnC5H5(CO)2SO2

Abstract

The compound MnC5H5(CO)2SO2 crystallizes in the monoclinic system, space group P21/c, in a unit cell of dimensions a = 10.98(2) Å, b = 10.63(2) Å, c = 7.43(2) Å, β = 100.75(8)° with Z = 4. The structure was determined from 1512 reflections obtained on films from a precession camera; the residual factor, R, was 0.093 after a full matrix least-squares refinement. The Mn–S bond seems very strong having a length (2.037(5) Å) which is smaller than the sum of the covalent radii by 0.3 Å The average distance [Formula: see text] is less than that usually observed in manganese–cyclopentadienyl complexes. The two CO groups are distinct. The instability of the complex might be explained, in part, by the crowding of the SO2 and CO ligands. [Journal translation]