Mn(<scp>iv</scp>) and Mn(<scp>v</scp>)-radical species supported by the redox non-innocent bis(2-amino-3,5-di-tert-butylphenyl)amine pincer ligand

Abstract

The electron-rich pincer ligand <bold>1</bold> has been synthesized and chelated to manganese, affording <bold>2</bold> in high yield. Complex <bold>2</bold> comprises two iminosemiquinone radicals coordinated to a Mn(<sc>iv</sc>) ion. Its two electron oxidation produces <bold>22+</bold>, which is a stable Mn(<sc>v</sc>)-iminosemiquinone radical complex.