氟联吡啶Fe和Co配合物的配体交换反应

氟联吡啶Fe和Co配合物的配体交换反应 LIGAND EXCHANGE REACTION FOR 4-FLUORO-2,2’-BIPYRIDINE Fe AND Co COMPLEXES 曲凡歧 Qu Fanqi Huang Xiaoling 1 first-author 黄筱玲 1 武汉大学化学系 武汉大学化学系 Department of Chemistry,Wuhan University Department of Chemistry,Wuhan University 用 19 F 和 1 H NMR 观测六配位氟联吡啶或联吡啶 Fe（Ⅰ）（Ⅱ）、Co（Ⅰ）（Ⅱ）配合物的配体交换反应。结果表明均符合通常的配体交换反应规律。实验还观测到电子转换反应先于配体交换反应,配体中引入氟联吡啶使测定手续变得更为简便。 Ligand exchange reaction of octahedron complexes Fe（Ⅰ）（Ⅲ）,Co（Ⅰ）（Ⅲ）containing 4- fluoro-2,2′-bipyridine（fbpy）was observed by the 1 H and 19 F NMR spectra.The experiment can be performed by adding a CD 3 CN or（CD 3 ） 2 CO solution of a certain amount of tris fbpy or bpy Fe,Co complexes and free ligand or complexes in the NMR tube,and determining the chemical shift and inte- gration at various time intervals.What exchange products were obtained by comparing the chemical shift of the sample to the well-know mixed ligand complexes.The ratio of different exchange product is calculated from the integrated area.The experimental results show that the ligand exchange reactions are all occurred under the given conditions;among these reactions,the exchange of Fe（fbpy） 3 2+ and bpy was the fastest,the reaction proceed toward equilibrium in 20 min.,the exchange of Co （fbpy） 3 3 + and bpy was the slowest,no change was observed in 10 min.;furthmore the evidence an in- ner-sphere pathway of electron transfer.Fbpy as a probe is very convenience for this study. 氟联吡啶 配体交换 NMR Fe Co O614.81 1992-04-01 2021-04-01 4