2-Chloroethyl ethyl sulfide sulfoxidation

Reaction of the sandwich-type POM [(Fc(0H2)2)j(A-a-PW9034)2 9 with a colloidal suspension of silica/alumina nanopartides ((Si/A102)Cl) resulted in the production of a novel supported POM catalyst [146-148]. In this case, about 58 POM molecules per cationic silica/alumina nanoparticle were electrostatically stabilized on the surface. The aerobic oxidation of 2-chloroethyl ethyl sulfide (mustard simulant) to the corresponding harmless sulfoxide proceeded efficiently in the presence of the heterogeneous catalyst and the catalytic activity of the heterogeneous catalyst was much higher than that of the parent POM. In addition, this catalytic activity was much enhanced when binary cupric triflate and nitrate [Cu(OTf)2/Cu(N03)2 = 1.5] were also present [148],... 

In 2001, Hill and co-workers (151) used a heterogeneous Ag5PV2Moio04o catalyst to mediate the oxidation of 2-chloroethyl ethyl sulfide to the corresponding sulfoxide at room temperature under 1.0 atm of air (Fig. 37). 

Key words Amino acids. Catalytic oxidation under ambient conditions, 2-chloroethyl ethyl sulfide, Co-catalysis by copper. Decontamination, Effect of ligands, Gold complexes. Mustard gas, Perfluorinated solvents. Solvent effect. Sulfoxide, Thioether... 

The photocatalytic reactions in acetonitrile were observed to have fewer primary products and a higher chemical yield of the desired sulfoxide (Fox et al., 1990). The photocatalytic oxidation of 2-chloroethyl methyl sulfide was found to be faster than the degradation of 2-chloroethyl ethyl. UV/ Ti02, in the presence of oxygen, yields the greatest amount of removal for the alkyl halides. The rate of alkyl halide removal was found to increase with increased concentrations of TiOz. 

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