Cobalt complexes of pyrrolecarboxamide ligands as catalysts in nitro reduction reactions: Influence of electronic substituents on catalysis and mechanistic insights

Sunil Yadav, Sushil Kumar, Rajeev Gupta

    Research output: Contribution to journalArticlepeer-review

    14 Scopus citations

    Abstract

    This work presents two square-planar Co(iii) complexes within a N4 coordination sphere created by two related pyrrolecarboxamide ligands. Both complexes functioned as catalysts for the hydrazine-mediated reduction of aromatic, heterocyclic, as well as aliphatic nitro substrates. Binding studies provided evidence that the square-planar Co(iii) complexes bind two equivalents of a substrate whereas mechanistic studies established the involvement of a Co3+-Co2+ based redox cycle in the catalysis. The Co(iii) complex having electron-withdrawing -Cl substituents on the ligand was noted to be a much better catalyst than the one with electron-donating -CH3 substituents.

    Original languageBritish English
    Pages (from-to)324-335
    Number of pages12
    JournalInorganic Chemistry Frontiers
    Volume4
    Issue number2
    DOIs
    StatePublished - Feb 2017

    Fingerprint

    Dive into the research topics of 'Cobalt complexes of pyrrolecarboxamide ligands as catalysts in nitro reduction reactions: Influence of electronic substituents on catalysis and mechanistic insights'. Together they form a unique fingerprint.

    Cite this