Chiral metal complexes. 9. Changes in tetradentate stereochemistry involving a Λ-α to Δ-α rearrangement

a new form of octahedral inversion

Jill A. Chambers*, Terence J. Goodwin, Moh'd W. Mulqi, Peter A. Williams, Roberts S. Vagg

*Corresponding author for this work

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

When Λ-α-[Co(R-picpn)Cl2)]Cl)4 (R-picpn = (3R)3-methyl 1,6-di(2-pyridyl)-2,5-diazahexane) is reacted with sodium oxalate in aqueous solution, the complex Λ-α[Co(R-picpn)(ox)]ClO4 is obtained. This reaction represents a total inversion of absolute configuration with respect to the metal centre. When isolated as the iodide salt, [Co(R-picpn)(ox)]I·1.5H2O, the cationic product is obtained as a mixture of Δ-α and Λ-β diastereoisomers with a minor quantity of the Λ-αform. These isomeric ratios appear to be influenced by differences in reaction conditions, including exposure to light.

Original languageEnglish
Pages (from-to)241-247
Number of pages7
JournalInorganica Chimica Acta
Volume75
Issue numberC
DOIs
Publication statusPublished - 1983

Bibliographical note

Erratum can be found in Inorganica Chimica Acta, 83(2), p. 143, 1984.
https://doi.org/10.1016/S0020-1693(00)82523-2

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