The chemistry of thietane ligands in polynuclear metal carbonyl complexes
- Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemistry and Biochemistry
Small ring compounds can be valuable reagents because they contain a supply of energy as a result of their ring straight and thus can engage in a wide range of exothermic ring opening reactions. Strained ring heterocycles are of particular interest because the heteroatoms can introduce useful functionality into the products. There are two important families of saturated strained ring heterocycles that contain sulfur: thiiranes and thietanes. The thiiranes are based on three-membered rings and thietanes are based on four membered rings. Unlike thiiranes, thietanes are sufficiently stable to serve as effective ligands in metal complexes through the coordination of one or both of the lone paris of electrons on the sulfur atom. In the latter case the molecules are invariably found as bridging ligands between two metal atoms. In this review, the coordination chemistry of thietane ligands in polynuclear metal carbonyl complexes (also known as cluster compounds) in both the terminal coordination mode and the bridging in coordination mode is discussed. This will include an extensive discussion of ring opening and cyclooligomerization transformations of these ligands. The review will conclude with a summary of recent studies of the coordination of thietane cyclooligomers (polythioether macrocycles) to metal cluster complexes. 52 refs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 160796
- Journal Information:
- Chemical Reviews, Journal Name: Chemical Reviews Journal Issue: 7 Vol. 95; ISSN 0009-2665; ISSN CHREAY
- Country of Publication:
- United States
- Language:
- English
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