Hydrochloric Acid → 4,4'-Diiododiphenylsulfone

Participants

Reaction Steps

To 204 g (1 mole) of iodobenzene was added 312 g (1.1 moles) of 4-iodobenzenesulfonic acid and the mixture was cooled with water while 123 g of (1.1 moles) of chlorosulfonic acid was added thereto at about 10° to about 20° C. over a period of 1 hour. After the addition, the reaction system was stirred for 3 hours while being maintained at 20° to 30° C. The hydrochloric acid gas evolved during the reaction was continuously removed from the reaction system. After the completion of the reaction, about 400 ml of water was added to the reaction mixture and 20 g of (0.1 mole) of the unreacted iodobenzene was was recovered by distillation. Separation of the precipitate by filtration gave 123 g of 4,4'-diiododiphenylsulfone in 58% yield. M.P. 201° to 202° C. Purity of 99.6%.

Provenance & Evidence