Chiral metal complexes. 1. Photochemical inversion in ternary Ru(II) complexes of diimines and L-tryptophane

Robert S. Vagg, Peter A. Williams*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

The compounds Δ,Λ-[Ru(phen)2(L-trp)] ClO4· 3H20 and Δ,Λ-[Ru(bipy)2(L-trp)] ClO4·3H20 (where L-trp is the L-tryptophane anion) have been isolated and the complex cations resolved into their diastereoisomeric forms using cation-exchange chromatography. Circular dichroism studies show the Δ-isomers to spontaneously invert into the Λ-forms in the presence of light in aqueous solution. These novel inversion reactions are the first reported in which substitution in the coordination sphere does not take place. The equilibrium constants for the reaction Δ-[Ru(diimine)2(L-trp)]+ aq ⇌ Λ-[Ru(diimine)2(L-trp)]+ aq are 4.0 and 2.1 for the phen and bipy compounds respectively.

Original languageEnglish
Pages (from-to)61-65
Number of pages5
JournalInorganica Chimica Acta
Volume51
Issue numberC
DOIs
Publication statusPublished - 1981

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