Organoiron complexes reaction with nucleophiles

Several important characteristics of this reaction are shown. First, the nucleophilic addition can be reversible if complex 736 is heated. Second, the complex can be decomposed by reaction with iodine (to give 737) or by protonolysis (with trifluoroacetic acid, TFA) to give cyclohexadiene derivative 738. The reagents used to remove the metal are similar to those used with organoiron complexes (sec. 8.9.A). 

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