The Reactivity of Sulfur Dioxide and Related Molecules to Transition Metal Complexes
Morrison, John A.
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This paper reviews the synthesis and reactivity of sulfur dioxide metal complexes, specifically those of the group six through twelve metals. Sulfur dioxide is a molecule of much interest because of its reactivity to transition metal elements and its effect on the environment. Furthermore, sulfur dioxide is of interest because it exhibits several different coordination modes when bonded to metal centers. It has been shown to bond as either a monodentate ligand bonding through either sulfur or oxygen, or bidentate ligand bonding through both sulfur and oxygen. Sulfur dioxide is generally synthesized by the direct addition of sulfur dioxide, as a liquid or gas, to the appropriate precursor. Both mononuclear and polynuclear complexes can be synthesized by this method. The reactivity of various compounds depends not only on the coordination of the sulfur dioxide, but also on the types of ligands bonded to the metal center.