2-Chloroethyl ethyl sulfide catalysts

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). 

Table I. Homogeneous Air-Based Oxidation of 2-Chloroethyl Ethyl Sulfide (CEES) by the Most Active Known Catalysts ...

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