Complexation of anthyridine-based ligand L with [(η⁶-cymene)RuCl₂]₂, [Cp*RhCl₂]₂, and [Cp*IrCl₂]₂ yielded a mononuclear complex: [(N,N-L)Ru(η⁶-cymene)Cl]Cl (1), [(N,N-L)Rh(Cp*)Cl]Cl (2), and [(N,N-L)Ir(Cp*)Cl]Cl (3), respectively [L = 5-phenyl-2,8-di-2-pyridinylanthyridine]. Upon treatment with (CH₃CN)PdCl₂, complexes 1–3 underwent o-metalation to yield heterobimetallic complexes Ru–Pd, Rh–Pd, and Ir–Pd, respectively. Complexes were all characterized by spectroscopic method, and some are further confirmed by X-ray crystallography. Complex Ru–Pd exhibits catalytic activities for the tandem reactions of Suzuki–Miyaura coupling/transfer hydrogenation of p-bromoacetophenone with phenylboronic acid in isopropanol, whereas Ir–Pd shows a moderate activity. However, complex Rh–Pd does not behave the same way. Furthermore, catalytic activity of these heterobimetallic complexes toward debromination/transfer hydrogenation of p-bromoacetophenonewas also investigated. The catalytic pathways of these processes were studied and discussed. This study reveals the base used in the reactions plays an important role in the reaction pathway.

中文翻译：

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基于蒽配体的杂双金属配合物的制备及催化活性

基于anthyridine -配体络合大号与[（η ⁶ -cymene）的RuCl ₂ ] ₂，混合[Cp *的RhCl ₂ ] ₂，和混合[Cp *的IrCl ₂ ] ₂，得到的单核络合物：[（Ñ，ñ -大号）钌（η ⁶ -cymene）CL]氯（1），[（ñ，ñ -大号）的Rh（CP *）CL]氯（2），和[（ñ，N-大号）IR（CP *）CL]氯（3）分别[ L＝ 5-苯基-2，8-二-2-吡啶基吡啶并吡啶]。在与（CH治疗₃ CN）的PdCl ₂复合物，1 - 3后行邻金属化，得到双核配合物的Ru-钯，铑-钯，和铱-钯，分别。配合物均通过光谱法表征，某些配合物通过X射线晶体学进一步证实。复杂的Ru-Pd在Suzuki-Miyaura的对接反应/对溴苯乙酮与苯硼酸在异丙醇中的转移氢化反应中表现出催化活性，而Ir-Pd则表现出中等活性。但是，复杂Rh–Pd的行为不同。此外，朝向的脱溴/转移氢化这些双核配合物的催化活性p也-bromoacetophenonewas调查。研究和讨论了这些过程的催化途径。这项研究揭示了用于反应的碱在反应途径中起着重要的作用。