1. Thio is the recommended and preferred name for the formally S2-ligand. In CAS index nomenclature this name is modified to thioxo when a terminal ligand is specified, while μx-thio specifies bridging S2-ligands. In this paper we use the term thio to refer to the terminal monatomic ligand in MoS units. See: Block, B. P.; Powell, W. H.; Fernelius, W. C.Inorganic Chemical Nomenclature; American Chemical Society: Washington, 1990; p 41.Chemical Abstracts Index Guide; Chemical Abstracts Service: Columbus, OH, 1994; Appendix 4.
2. Bioinorganic Chemistry of Pterin-Containing Molybdenum and Tungsten Enzymes
3. Young, C. G.; Wedd, A. G.Encyclopedia of Inorganic Chemistry; King, R. B. Ed.; Wiley, Chichester, U.K., 1994; p 2330 and references therein.
4. Pilato, R. S.; Stiefel, E. I. InInorganic Catalysis; Reedijk, J., Ed.; Marcel Dekker: New York, 1993; p 131 and references therein.
5. Thio and seleno compounds of the transition metals with the do configuration