Electrophilic substitution reactions in heterocycles complexed to exchange-inert metal ions. (Ethylenediamine)cobalt(III) complexes of imidazole and histidine

(Ethylenediamine)cobalt(III) complexes of imidazole and histidine are nitrated under mild conditions with a standard HNO{sub 3}-H{sub 2}SO{sub 4} nitrating mixture. In contrast to the more robust pentaamminecobalt(III) complexes, the nitrated imidazole ligand readily dissociates, providing an excell...

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