광학활성인 $[Co(edta)]^- 착물과 [Co(Hedta)Cl]^- 착물의 반응성과 구조적인 변화를 여러 가지 촉매(H^+, OH^-, 그리고 Cd^{2+})의 존재하에서 연구하였다. Δ-[Co(edta)]- 착물에 촉매로서 H+ 또는 OH-를 각각 작용시키면 착물에 대한 리간드의 G-ring이 열리면서, 광학활성인 [Co(Hedta)OH_2]착물과 라세미-[Co(edta)OH]^{2-} 착물이 생성된다. (-)546-[Co(Hedta)Cl]- 착물에 촉매로서 Cd^{2+}$를 작용시키면, 고리닫힘이 일어나 Δ-[Co(edta)]-착물이 생성되어지고, 이 때 절대배치는 유지되어진다.
The reactivity and structural change of optical active $[Co(edta)]^- and [Co(Hedta)Cl]^- complexes has been investigated in the presence of several catalyst (H^+, OH^-, and Cd^{2+}). When Δ-[Co(edta)]- complex was reacted with H^+ or OH^- as the catalyst, G-ring opening of ligand in the complex was accompanied, and then, optically active, [Co(Hedta)OH_2], and racemic mixture, [Co(edta)OH]_2- were produced. When (-)546-[Co(Hedta)Cl]- complex was reacted with Cd^{2+}$ as the catalyst, the Ring-close was accompanied, and Δ-[Co(edta)]- complex was produced, which the absolute configuration was retained.
