Uppadine, Lindsay H., Keene, F Richard, and Beer, Paul D. (2001) Approaches towards the enantioselective recognition guest species using chiral receptors based on ruthenium(II) with amide bipyridine ligands. Dalton Transactions, 2001. pp. 2188-2198.

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Abstract

The syntheses of chiral anion receptors based on rhenium(I) and ruthenium(II) with amide bipyridine ligands are reported. The rhenium(I) hosts were prepared in moderate to high yields by co-ordinating chiral bipyridine ligands to a Re(CO)3Br centre. The ruthenium(II) receptors were synthesised via the chiral building blocks - and -[Ru(bpy)2(py)2]2+ or by chromatographic resolution on a SP Sephadex C-25 cation exchanger. Chiral purity was determined by 1H NMR and circular dichroism spectroscopy and lanthanide shift experiments. 1H NMR titration studies showed that these receptors bind chiral carboxylate anions in DMSO-d6, although significant chiral discrimination was not observed.

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