Abstract
Iodination of acenaphthene with iodine–peracetic acid in acetic acid gave 5-iodoacenaphthene (40%). Similar iodination of fluorene gave 2-iodofluorene (65%), and with excess of reagents 2,7-di-iodofluorene (68%). These products show the electrophilic nature of the attacking species. An attempt to di-iodinate acenaphthene failed. Optimum reaction conditions which minimise concurrent oxidation are described.

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