Chiral metal complexes. 20. The Λ-β to Δ-α-[Co(edda)CO3]- inversion

Michael A. Cox, R. Huw Griffiths, Peter A. Williams*, Robert S. Vagg

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)


    The Δ-α-and Λ-β- forms of [Co(edda)CO3]- have been isolated as crystalline diastereoisomeric salts of the cation Δ-[Co(en)2(ox)]+. When each salt is dissolved in 1.0 F aqueous Na2CO3 at 25°C an isomeric equilibration process occurs between these species in which the Δ-α form predominates before the eventual racemisation of both anionic species. On proceeding to equilibrium the Λ-β-[Co(edda) CO3]- isomer is observed to invert its absolute configuration at the central metal ion in converting to the Δ-α stereoisomer. This is the first reported example of inversion-isomerisation involving the β → α transformation in a chiral complex containing a linear tetradentate.

    Original languageEnglish
    Pages (from-to)155-158
    Number of pages4
    JournalInorganica Chimica Acta
    Issue number2
    Publication statusPublished - 15 Sep 1985


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