Abstract
Mononuclear Co2+/3+ complexes of 13‐membered amide‐based macrocycles have been synthesized, characterized and utilized in the chemo‐selective reduction of assorted nitro compounds including aromatic, heterocyclic and aliphatic ones. Catalytic results illustrate that Co3+ complexes are better catalysts than the analogous Co2+ complexes while mechanistic investigations display the generation of an [(L)Co2+(μ‐NH2NH2)Co2+(L)] intermediate during the catalysis.
Mononuclear Co2+ as well as Co3+ complexes of two different 13‐membered macrocyclic ligands have been synthesized and utilized in the chemo‐selective reduction of assorted nitro compounds including aromatic, heterocyclic and aliphatic substrates. Mechanistic studies suggest the involvement of an [(L)Co2+(μ‐NH2NH2)Co2+(L)] intermediate and superiority of Co3+ complexes over Co2+ ones in catalysis.