Ruthenium complexes sulphur donors

A full paper by Alper and Chan, describing in detail the formation of sulphur-donor ligand ortho-metallated complexes (74) by the reaction of substituted thiobenzophenones with di-iron enneacarbonyl, Fe2(CO)>, has appeared. The complexes (74) appeared to be valuable starting materials in the synthesis of the little-known isobenzothiophen heterocycles. Related ortho-metallated thiobenzophenone complexes of ruthenium were found to have a different structure (75). Some non-aromatic thioketones also react with di-iron enneacarbonyl, but these reactions appear to be more complicated. Thus adamantanethione yielded no less than four different complexes, of which (76) was the prevailing one (71%). Thiocamphenilone (77) formed a complex analogous with (76), but such a complex could not be obtained with thiofenchone (78), presumably for steric reasons. Two... 

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