Exchange Reactions of Iodide Ion With Aromatic Iodides

The exchange reactions of iodide ion with o- and p-nitroiodobenzene in the temperature range about 170°–238°C were apparently second order with activation energies of approximately 29 and 33.5 kcal. per mole respectively. In the same temperature range the exchange of iodide ion with iodobenzene and m-nitroiodobenzene appeared to be first order reactions, with activation energies of approximately 25 kcal. per mole.