Tetrachloroethane, electrophilic

Poly(ether sulfide)s were also prepared by a precursor route, 4,4 -Difluorodiphe-nylsulfoxide (234) was used as electrophilic monomer in combination with hydroquinone or 4,4 -dihydroxybiphenyl. The resulting poly(ether sulfoxide)s were then reduced in tetrachloroethane by means of oxalylchloride and tetrabutylammonium fluoride (235) [357]. Furthermore, the preparation of sulfonated poly(phenylene-sulfide) should be mentioned. SO3 served as sulfonating agent and the sulfonated polysulfide was treated with SOCI2, whereby a poly sulfide with SO2CI and Cl substituents was obtained [358]. 

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