Mol­ecular structure of fac-[Mo(CO)(3)(DMSO)(3)]

The title compound, tri­carbonyl­tris­(dimethyl sulfoxide)­molybdenum, [Mo(C(2)H(6)OS)(3)(CO)(3)] or fac-[Mo(CO)(3)(DMSO)(3)], crystallizes in the triclinic space group P [Image: see text] with two mol­ecules in the unit cell. The geometry around the central molybdenum is slightly distorted octa­hedral and the facial isomer is found exclusively. The packing within the crystal is stabilized by three-dimensional non-classical inter­molecular hydrogen-bonding contacts between individual methyl substituents of di­methyl sulfoxide and the oxygen atoms of either another di­methyl sulfoxide or a carbonyl ligand on adjacent complex mol­ecules. The observed bond lengths in the carbonyl ligands and between carbonyl carbon atoms and molybdenum are correlated to the observed FT–IR bands for the carbonyl stretches and compared to respective metrical parameters of related complexes.