Answer to Question #17994 in Organic Chemistry for Lilly
The direct iodination of phenol by aqueous I2 turned, not unexpectedout to give five different iodophenols: 2-iodophenol, 4-iodophenol, 2,6-diiodophenol, 2,4-diiodophenol and 2,4,6-triiodophenol. When
elemental iodine is treats with equivalent amounts of NaOH the solution turnes colorless, due to the formation of HOI. This strongly indicates that the same iodinating species, probably
HOI, operates in both cases.
I2 + H2O --> HOI + HI
HOI + phenol --> iodophenol + H2O
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