The structure of dirhodium compounds contains a unique Rh-Rh bond, two axial ligands and four bridging ligands. In the dirhodium(II) compounds, it is easy to migrate the coordinating atoms of the bridging ligand during the catalysis process, which leads to the degradation of the catalyst. Coordination atom migration was identified in bridging ligands. To improve the catalyst stability, we carried out a study on the effect of fine-tuning of the bridging ligand on the dirhodium compound. Several dirhodium compounds were designed and synthesized. During this process, we have successfully found Rh₂(5-Br-esp)₂ and Rh₂(5-^tBu-esp)₂, which are closer to the ideal geometric configuration of the dirhodium(II) compounds. Rh₂(5-Br-esp)₂ has been applied in the oxidation of propargyl position and Rh₂(5-^tBu-esp)₂ in the formation reaction of the C–N bond.

铑化合物的结构包含一个独特的Rh-Rh键、两个轴向配体和四个桥连配体。在二铑(II)化合物中，在催化过程中桥接配体的配位原子很容易发生迁移，从而导致催化剂的降解。在桥连配体中发现了配位原子迁移。为了提高催化剂的稳定性，我们对桥接配体的微调对二铑化合物的影响进行了研究。设计并合成了几种铑化合物。在这个过程中，我们成功地发现了Rh ₂ (5-Br-esp) ₂和Rh ₂ (5 - ^t Bu-esp) ₂，这更接近于 dirhodium(II) 化合物的理想几何构型。Rh ₂ (5-Br-esp) ₂已应用于炔丙基位置的氧化，Rh ₂ (5 - ^t Bu-esp) ₂已应用于C-N键的形成反应。