Heterogeneous ring-opening reactions and Knoevenagel condensation reactions with cobalt complexes: Effect of CoII versus CoIII states on catalysis

Sushil Kumar, Rajeev Gupta

    Research output: Contribution to journalArticlepeer-review

    2 Scopus citations

    Abstract

    This work illustrates comparative catalytic performance of two sets of cobalt complexes within a common macrocyclic ligand environment: CoII complexes 1 and 2 versus CoIII complexes 3 and 4. All four cobalt complexes functioned as the heterogeneous catalysts for the ring-opening reactions of assorted epoxides as well as Knoevenagel condensation reactions of assorted aldehydes. Cobalt(II) complexes were noted to be the superior catalysts over cobalt(III) complexes for both types of organic transformations. The observed difference in the catalytic performance of two sets of cobalt complexes has been related to the kinetic differences between CoII versus CoIII ions. All four cobalt complexes display high catalytic efficiency and excellent reusability without any apparent loss in the catalytic performance.

    Original languageBritish English
    Pages (from-to)843-852
    Number of pages10
    JournalJournal of the Indian Chemical Society
    Volume95
    Issue number7
    StatePublished - Jul 2018

    Keywords

    • Catalysis
    • Cobalt
    • Heterogeneous catalysis
    • Knoevenagel condensation reactions
    • Ring-opening reactions

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