Although metal complexes of coordinated sulfur ligands have been known
for nearly a century (74) little was clearly established about their structures and
bonding until comparatively recently . The whole field of metal complexes of
group VIB ligands was reviewed in 1965 (185) and. more recently (in 1981). THE STEREODYNAMICS OF METAL COMPLEXES OF SULFUR LIGANDS 3
the specific area of transition metal complexes of thioethers, selenoethers, and
telluroethers was comprehensively surveyed (207).