Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Stereoselective Electron Transfer and Ionic Association between Λ$-[Co(EDDS)]^-and [Co(en)_3]^{2+}$

광학활성인 Λ$-[Co(EDDS)]^-$와 $[Co(en)_3]^{2+}$간의 입체선택적 전자전달 및 이온회합

  • Published : 19900300
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Abstract

Absolute configuration of optically active [Co(EDDS)]- (EDDS = ethylenediaminedisuccinate) complex was determined as Λ-form by octant rule and spectroscopic data, and the stereoselective ionic association of Λ-[Co(EDDS)]- and racemic-$[Co(en)^3]_{3+}$ occurs preferrentially between Λ$-[Co(EDDS)]-$ and Δ$-[Co(en)3]3+$. The stereoselective electron-transfer reaction between Λ-[Co(EDDS)]- and racemic-$[Co(en)_3]^{2+}$ has produced 14% e.e (e.e = enantiomeric excess) of Δ$[Co(en)_3]^{3+}$ through the stereoselective ion pairing.

광학활성인 [Co(EDDS)]- (EDDS = ethylenediaminedisuccinate) 착물의 절대구조는 옥탄트규칙과 분광학적인 자료에 따라 Λ-형임을 확인하였고, 절대구조가 확인된 Λ$-[Co(EDDS)]-$ 와 라세미체-$[Co(en)_3]^{3+}$간의 입체선택적 이온회합에서는 Λ$-[Co(EDDS)]-$ 와 Δ$-[Co(en)_3]^{3+}$간의 이온회합이 우선적으로 일어남을 조사하였다. 아울러 Λ$-[Co(EDDS)]-$ 와 라세미체$-[Co(en)_3]^{2+}$간의 입체선택적 전자전달반응에서는 착물간의 입체선택적 이온회합에 따라 Δ$[Co(en)_3]^{3+}$가 14% e.e (e.e = enantiomeric excess)로 생성되었다.

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