Tungsten complexes hydrogen sulfide

Lewis Bases. A variety of other ligands have been studied, but with only a few of the transition metals. There is still a lot of room for scoping work in this direction. Other reactant systems reported are ammoni a(2e), methanol (3h), and hydrogen sulfide(3b) with iron, and benzene with tungsten (Tf) and plati num(3a). In a qualitative sense all of these reactions appear to occur at, or near gas kinetic rates without distinct size selectivity. The ammonia chemisorbs on each collision with no size selective behavior. These complexes have lower ionization potential indicative of the donor type ligands. Saturation studies have indicated a variety of absorption sites on a single size cluster(51). 

Hydrogen, molybdenum complex, 27 3 tungsten complex. 27 6 Hydrogen sulfide, titanium complex, 27 66 tungsten complex. 27 67... 

Hydrogen oxidation catalysis happens to be more difficult to obtain than hydrogen production, if noble metals are excluded. In particular, several nanoparticulate catalysts such as transition metal oxides/sulfides-based nanoparticles catalyze H2 evolution [29-34], while only tungsten carbide has been demonstrated to be active for H2 oxidation [35]. Even in the case of organometallic catalysts, only few complexes have proved to be able to catalyze H2 oxidation rather than evolution (see below). 

A variety of sulfides and dibenzothiophene are oxidized to the corresponding sulfoxide or sulfone in high yields with mononuclear as well as dinuclear diperoxo complexes of tungsten as oxidants. The complexes also effectively catalyse oxidation of sulfides by hydrogen peroxide (HP) selectively to sulfone with reasonably good turnover frequency (Scheme 6)J ... 

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