Stereoselectivity on electron transfer reactions(I); reaction of the Λ-[co(edds)]- and rac-[co(diamine)3]2+ complexes (diamine = en, chxn)

Dong Yeub Kim; Maeng Jun Jung; O. H. Chang-Eon; Myung Ki Doh; Dong Jin Lee

doi:10.1080/00958979608023554

Stereoselectivity on electron transfer reactions(I); reaction of the Λ-[co(edds)]^- and rac-[co(diamine)₃]²⁺ complexes (diamine = en, chxn)

Dong Yeub Kim, Maeng Jun Jung, O. H. Chang-Eon, Myung Ki Doh, Dong Jin Lee

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Abstract

The absolute configuration of an optically active Λ-[Co(EDDS)]^- (EDDS = ethylene-diaminedisuccinate) complex was determined as Λ by the regional rule and spectroscopic data. The stereoselective ionic association between Λ-[Co(EDDS)]^- and rac-[Co(en)₃]³⁺ occurs preferentially between Λ-[Co(EDDS)]^- and Δ-[Co(en)₃]³⁺. The stereoselective electron transfer reaction between Λ-[Co(EDDS)]^- and rac-[Co(en)₃]²⁺ has been investigated in aqueous solution, DMF and DMSO. Their enantiomeric excesses (e.e.) observed are 14%, 26% and 40% of Δ-[Co(en)₃]³⁺, respectively. The electron transfer reaction between Λ-[Co(EDDS)]^- and conformationally restricted [Co(chxn)₃]²⁺ has been examined in aqueous and DMSO solution. In aqueous solution, there are four isomers in the product which were determined as lel₃, lel₂ob, lelob₂, and ob₃ of Δ-[Co(chxn)₃]³⁺ with optical purities of 22%, 25%, 11% and 10% e.e. respectively. In DMSO, the reaction produces lel₃-Δ-and lel₂ob-Δ-[Co(chxn)₃]³⁺ with optical purities of 100% and 75% e.e. respectively.

Original language	English
Pages (from-to)	217-225
Number of pages	9
Journal	Journal of Coordination Chemistry
Volume	37
Issue number	1-4
DOIs	https://doi.org/10.1080/00958979608023554
State	Published - 1996

Keywords

Cobalt(III) complexes
Electron transfer
Optical activity

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10.1080/00958979608023554

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title = "Stereoselectivity on electron transfer reactions(I); reaction of the Λ-[co(edds)]- and rac-[co(diamine)3]2+ complexes (diamine = en, chxn)",

abstract = "The absolute configuration of an optically active Λ-[Co(EDDS)]- (EDDS = ethylene-diaminedisuccinate) complex was determined as Λ by the regional rule and spectroscopic data. The stereoselective ionic association between Λ-[Co(EDDS)]- and rac-[Co(en)3]3+ occurs preferentially between Λ-[Co(EDDS)]- and Δ-[Co(en)3]3+. The stereoselective electron transfer reaction between Λ-[Co(EDDS)]- and rac-[Co(en)3]2+ has been investigated in aqueous solution, DMF and DMSO. Their enantiomeric excesses (e.e.) observed are 14%, 26% and 40% of Δ-[Co(en)3]3+, respectively. The electron transfer reaction between Λ-[Co(EDDS)]- and conformationally restricted [Co(chxn)3]2+ has been examined in aqueous and DMSO solution. In aqueous solution, there are four isomers in the product which were determined as lel3, lel2ob, lelob2, and ob3 of Δ-[Co(chxn)3]3+ with optical purities of 22%, 25%, 11% and 10% e.e. respectively. In DMSO, the reaction produces lel3-Δ-and lel2ob-Δ-[Co(chxn)3]3+ with optical purities of 100% and 75% e.e. respectively.",

keywords = "Cobalt(III) complexes, Electron transfer, Optical activity",

author = "Kim, {Dong Yeub} and Jung, {Maeng Jun} and Chang-Eon, {O. H.} and Doh, {Myung Ki} and Lee, {Dong Jin}",

year = "1996",

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language = "English",

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T1 - Stereoselectivity on electron transfer reactions(I); reaction of the Λ-[co(edds)]- and rac-[co(diamine)3]2+ complexes (diamine = en, chxn)

AU - Kim, Dong Yeub

AU - Jung, Maeng Jun

AU - Chang-Eon, O. H.

AU - Doh, Myung Ki

AU - Lee, Dong Jin

PY - 1996

Y1 - 1996

N2 - The absolute configuration of an optically active Λ-[Co(EDDS)]- (EDDS = ethylene-diaminedisuccinate) complex was determined as Λ by the regional rule and spectroscopic data. The stereoselective ionic association between Λ-[Co(EDDS)]- and rac-[Co(en)3]3+ occurs preferentially between Λ-[Co(EDDS)]- and Δ-[Co(en)3]3+. The stereoselective electron transfer reaction between Λ-[Co(EDDS)]- and rac-[Co(en)3]2+ has been investigated in aqueous solution, DMF and DMSO. Their enantiomeric excesses (e.e.) observed are 14%, 26% and 40% of Δ-[Co(en)3]3+, respectively. The electron transfer reaction between Λ-[Co(EDDS)]- and conformationally restricted [Co(chxn)3]2+ has been examined in aqueous and DMSO solution. In aqueous solution, there are four isomers in the product which were determined as lel3, lel2ob, lelob2, and ob3 of Δ-[Co(chxn)3]3+ with optical purities of 22%, 25%, 11% and 10% e.e. respectively. In DMSO, the reaction produces lel3-Δ-and lel2ob-Δ-[Co(chxn)3]3+ with optical purities of 100% and 75% e.e. respectively.

AB - The absolute configuration of an optically active Λ-[Co(EDDS)]- (EDDS = ethylene-diaminedisuccinate) complex was determined as Λ by the regional rule and spectroscopic data. The stereoselective ionic association between Λ-[Co(EDDS)]- and rac-[Co(en)3]3+ occurs preferentially between Λ-[Co(EDDS)]- and Δ-[Co(en)3]3+. The stereoselective electron transfer reaction between Λ-[Co(EDDS)]- and rac-[Co(en)3]2+ has been investigated in aqueous solution, DMF and DMSO. Their enantiomeric excesses (e.e.) observed are 14%, 26% and 40% of Δ-[Co(en)3]3+, respectively. The electron transfer reaction between Λ-[Co(EDDS)]- and conformationally restricted [Co(chxn)3]2+ has been examined in aqueous and DMSO solution. In aqueous solution, there are four isomers in the product which were determined as lel3, lel2ob, lelob2, and ob3 of Δ-[Co(chxn)3]3+ with optical purities of 22%, 25%, 11% and 10% e.e. respectively. In DMSO, the reaction produces lel3-Δ-and lel2ob-Δ-[Co(chxn)3]3+ with optical purities of 100% and 75% e.e. respectively.

KW - Cobalt(III) complexes

KW - Electron transfer

KW - Optical activity

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SN - 0095-8972

VL - 37

SP - 217

EP - 225

JO - Journal of Coordination Chemistry

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IS - 1-4

ER -

Stereoselectivity on electron transfer reactions(I); reaction of the Λ-[co(edds)]^- and rac-[co(diamine)₃]²⁺ complexes (diamine = en, chxn)

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