Conversions of Chlorine-containing Aliphatic Compounds in the Presence of Coordination-unsaturated Metals

Conversions of aliphatic chlorine-containing compounds (chloroalkenes, chloroalkanes, and derivatives of chloro-substituted carboxylic acids) occur under the action of aprotic acids. Chloroethylenes are polymerised by a cationic mechanism with the formation of oligomeric and polymeric products. The principal reaction of chloroalkanes and chlorocycloalkanes in the presence of salts of coordination-unsaturated metals is dehydrochlorination, which proceeds either intramolecularly or intermolecularly with the formation of polymers with conjugated double bonds. For polychloro-containing compounds, in addition to the dehydrochlorinations, elimination of chlorine occurs. Perchloroalkanes (from C₃ and higher) in the presence of aprotic acids also undergo degradation with breaking of the carbon–carbon bond.
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