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

Robert S. Vagg; Peter A. Williams

doi:10.1016/S0020-1693(00)88318-8

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 journal › Article › peer-review

40 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 language	English
Pages (from-to)	61-65
Number of pages	5
Journal	Inorganica Chimica Acta
Volume	51
Issue number	C
DOIs	https://doi.org/10.1016/S0020-1693(00)88318-8
Publication status	Published - 1981

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

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.",

author = "Vagg, {Robert S.} and Williams, {Peter A.}",

year = "1981",

doi = "10.1016/S0020-1693(00)88318-8",

language = "English",

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journal = "Inorganica Chimica Acta",

issn = "0020-1693",

publisher = "Elsevier",

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T1 - Chiral metal complexes. 1. Photochemical inversion in ternary Ru(II) complexes of diimines and L-tryptophane

AU - Vagg, Robert S.

AU - Williams, Peter A.

PY - 1981

Y1 - 1981

N2 - 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.

AB - 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.

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U2 - 10.1016/S0020-1693(00)88318-8

DO - 10.1016/S0020-1693(00)88318-8

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VL - 51

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EP - 65

JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

SN - 0020-1693

IS - C

ER -

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

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