Abstract
Abstract The organometallic chemistry of S 2- and SH - ligands is outlined. The ability of substituent free sulfur to act as a two, four, or six electron donor and of the SH unit to act as a one, three, or five electron donor is the reason for structural diversity and the preference for polynuclear complexes. Lack of inertness due to unshared electron pairs on the sulfur ligands limits the number of accessible compounds. The reactivity of organometal-SH complexes is not comparable to that of simple R-SH compounds. Due to their extremely low acidity derivatizations require special pathways. The most typical S 2- complexes contain M 3 S units which have characteristic electron reservoir properties. These properties are of structural, chemical, electrochemical, and biochemical significance. Sulfur bridged organometallic clusters have made possible several new basic metal cluster reactions.
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