The reactions of nitrosoarenes with cationic cyclohexadienyl complexes of iron tricarbonyl: an ESR study

The reactions of nitrosoarenes with the (cyclohexadienyl)Fe(CO) 3 cation have been investigated by using electron spin resonance spectroscopy. The radicals produced are nitroxides of the type (OC) 3 Fe(C 6 H 7 )(Ar)N—O• but, in some cases, disproportionation and loss of the metal carbonyl fragment leads to the corresponding C 6 H 5 (Ar)N—O• radical. With bulky nitrosoarenes, such as C 6 Me 5 NO, isomers are observed in which the aryl ring …