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分别用绝对不对称合成和改进的拆分方法制备标题配合物!-(+)D-cis-[CoBr(NH3)(en)2]Br2(1)和“-(-)D-cis-[CoBr(NH3)(en)2]Br2(2),以及制备了cis-[CoBr(NH3)(en)2]Br·22H2O(3)(en=1,2-乙二胺).用元素分析、差热-热重、旋光度、UV-Vis、CD光谱等对产物进行了表征.通过CD光谱法获得了绝对不对称合成Co(III)配合物的产物ee值分布图.当利用绝对不对称合成得到的手性Co(III)配合物去“逆向拆分”外消旋溴代樟脑磺酸铵[NH4(dl-BCS)]时只获得部分拆分,初步认为这与交互拆分过程中阴阳离子之间的有效手性识别有关,对于手性Co(III)配合物的绝对不对称合成还提出了一个新的反应机理,即“催化-结晶诱导”机理.
The title complex was prepared by absolute asymmetric synthesis and improved resolution, respectively. - (+) D-cis- [CoBr (NH3) [CoBr (NH3) 2] Br2 (2) and cis- [CoBr (NH3) 2] Br.22H2O (3) The products were characterized by differential thermal analysis-thermogravimetric analysis, thermogravimetric analysis, optical rotation, UV-Vis and CD spectroscopy.The ee distributions of absolute asymmetric synthetic Co (III) complexes were obtained by CD spectroscopy, Asymmetric synthesis of the obtained chiral Co (III) complex only partially resolved the racemic ”reverse resolution“ of racemic bromide bromide camphorsulfonic acid [NH4 (dl-BCS)], During the process of the effective chiral recognition between the anions and cations, a new reaction mechanism is proposed for the absolute asymmetric synthesis of chiral Co (III) complexes, namely the ”catalysis - crystallization induction" mechanism.