Preparation and Spectroscopic Studies of Cobalt(III) Complexes Containing Optically Active Seven-membered Chelate Ligands
作者:Masaaki Kojima、Ken’ichi Morita、Junnosuke Fujita
DOI:10.1246/bcsj.54.2947
日期:1981.10
New cobalt(III) complexes of the types, trans-[CoCl2L2]+, [Co(NH3)4L]3+, cis-[Co(NH3)2L2]3+, and [Co(en)2L]3+, where L denotes a seven-membered chelate diamine ligand, (R)-2-methyl-1,4-butanediamine or meso- and (R or S)-2,5-hexanediamine, have been prepared. The dichloro complexes decompose gradually even in the solid state, and rapidly in methanol. The ammine and ethylenediamine complexes are stable
新型钴 (III) 配合物,反式-[CoCl2L2]+、[Co(NH3)4L]3+、顺式-[Co(NH3)2L2]3+ 和 [Co(en)2L]3+,其中 L 表示七元螯合二胺配体,已制备 (R)-2-甲基-1,4-丁二胺或内消旋和 (R 或 S)-2,5-己二胺。二氯配合物即使在固态下也会逐渐分解,在甲醇中会迅速分解。氨和乙二胺配合物在酸性水中稳定,但在中性水中逐渐分解。已在水溶液或丙酮溶液中记录了所有配合物的吸收光谱和圆二色光谱。第一吸收带区的圆二色光谱因硫酸根离子的加入而发生变化,并从异构体的结构和七元螯合环的构象不稳定性方面讨论了这种变化。