In a recent publication, HJ Lucas and coworkers2 have shown definitely that di-o- tolyliodonium iodide decomposes at 155'into o-iodotoluene. A very plausible mechanism of the rearrangement put forward by these workers involves first the formation from the di-o- tolyliodonium ion of equal amounts of o-iodotoluene and positive o-tolyl ion by the scission of a CI bond, and second the combination of this ion with the negative iodide ion, to form a ...
