Stereoselective Formation and Characterization of<i>S</i>-Bridged Dinuclear<i>Λ</i>- and<i>Δ</i>-[Co{Co(didentate-<i>N</i>,<i>S</i>)<sub>3</sub>}(D-pen-<i>N</i>,<i>O</i>,<i>S</i>)]-Type Complexes (didentate = 2-Aminoethanethiolate, L-Cysteinate, and D-Penicillaminate (D-pen))
作者:Toshiaki Yonemura、Sayuri Nakahira、Tomoharu Ama、Hiroshi Kawaguchi、Takaji Yasui、Ken-ichi Okamoto、Jinsai Hidaka
DOI:10.1246/bcsj.68.2859
日期:1995.10
Novel S-bridged dinuclear cobalt(III) complexes having different absolute configurations in [Co(didentate-N,S)3] moieties, Λ- and Δ-[CoCo(didentate-N,S)3}(D-pen-N,O,S)]+ or 2− (didentate = 2-aminoethanethiolate (aet), L-cysteinate (L-cys), and D-penicillaminate (D-pen)), were prepared stereospecifically. The dinuclearizing reaction of ΔLLL-fac(S)-[Co(L-cys-N,S)3]3− with [CoCl(NH3)5]2+ and D-penicillaminate
在 [Co(didentate-N,S)3] 部分,Λ- 和 Δ-[CoCo(didentate-N,S)3}(D-pen) 中具有不同绝对构型的新型 S-桥连双核钴 (III) 配合物-N,O,S)]+ 或 2-(双齿 = 2-氨基乙硫醇盐 (aet)、L-半胱氨酸盐 (L-cys) 和 D-青霉酸盐 (D-pen))是立体定向制备的。ΔLLL-fac(S)-[Co(L-cys-N,S)3]3− 与 [CoCl(NH3)5]2+ 和 D-青霉酸酯的双核化反应在 [Co(L) -cys-N,S)3] 部分,而使用 Co(II) 离子代替 [CoCl(NH3)5]2+ 的反应伴随着 [Co(L-cys-N,S) )3] 部分。构型反转的发生与双核配合物形成过程中两个配体之间的分子内N-H···O氢键有关。新制备的双核配合物根据其电子吸收、CD、13C NMR 和 IR 光谱数据进行了表征。[CoCo(didentate-N