Synthesis and characterization of hexadentate cobalt(III) complexes with new edta-type ligands Part 3. Circular dichroism of cobalt(III) complexes of ethylenediamine-N,N,N′-triacetic-N′-3-propionic acid and ethylenediamine-N,N,-diacetic-N′,N′-di-3-propionic acid
作者:Dušan J. Radanović、Miloš I. Djuran、Tomislav S. Kostić、Chris Maricondi、Bodie E. Douglas
DOI:10.1016/s0020-1693(00)91463-4
日期:1993.5
Cobalt(III)complexes with the hexadentate ligands, ethylenediamine-N,N,N′-triacetate-N′-3-propionate(ed3ap) and ethylenediamine-N,N-diacetate-N′,N′-di-3-propionate ion (u-eddadp), have been prepared, chromatographically separated and resolved. Only one of two geometrical isomers of the [Co(ed3ap)]− complex was isolated. A 1H NMR spectrum of this isomer,trans(O5)-[Co(ed3ap)]−, indicates that its six-membered
钴(III)与六齿配体,乙二胺-N,N,N'-三乙酸酯-N'-3-丙酸酯(ed3ap)和乙二胺-N,N-二乙酸酯-N',N'-二-3-丙酸酯络合离子(u-eddadp)已制备,色谱分离和分离。仅分离了[Co(ed3ap)]-络合物的两个几何异构体之一。该异构体反式(O5)-[Co(ed3ap)]-的1H NMR光谱表明,其六元丙酸酯螯合环赤道键合到钴(III)离子上。六齿u-eddadp配体没有相似的结构变化。(-)546-trans(O5)-[Co(ed3ap)]-和(+)546- [Co(u-eddadp)]-在第一自旋允许吸收带区域中以最低能量在正CD峰处复合暂时分配A绝对配置。