Soft activation of the C-S bond:: X-ray diffraction and spectroscopic study of the cluster Ru4(μ4-S)(μ,η3-C3H5)2(CO)12

The complex Ru-4(mu(4)-S)(mu,eta(3) -C3H5)(2)(CO)(12) is prepared and examined by IR and NMR spectroscopy; its crystal structure is determined (an automatic Bruker-Nonius X8 Apex four-circle diffractometer equipped with a 2-D CCD-detector, 100 K, graphite-monochromated molybdenum source, lambda = 0.71073 angstrom). The crystal belongs to the orthorhombic crystal system with unit cell parameters a = 19.3781(9) angstrom, b = 12.2898(7) angstrom, c = 10.1726(4) angstrom, V = 2422.6(2) angstrom(3), space group Pnma, Z = 4, composition C18H10O12Ru4S, d(x) = 2.343 g/cm(3) stop. The molecule of point symmetry C-1 is situated on the mirror plane of the space group Pnma, two carbonyl groups at Ru2 and Ru3 atoms overlapping with the allylic ligand with a weight of 50% so that carbon atoms coincide. Thus, we have a racemic structure with two overlapping enantiomers of the molecule of Ru-4(mu(4)-S)(mu,eta(3)-C3H5)(2)(CO)(12).