AbstractHerein we report the first mesoionic carbene (MIC)‐Mn(I) complex Mn‐bim‐MICimz derived from imidazolylidene motif. Structurally the octahedral Mn(I) complex Mn‐bim‐MICimz was assembled with an anionic benzimidazolato‐anchored imidazolylidene MIC‐based bidentate ligand (bim‐MICimz) and four CO ligands, as supported by detailed characterization using NMR and FTIR spectroscopy, mass spectrometry, and single crystal X‐ray diffraction study. We reckoned that the bim‐MICimz ligand would provide a robust and stable bonding with the Mn(I) centre, and also enhance electron density at the Mn(I) centre through its stronger σ‐donating/weaker π‐accepting property. These structural and electronic attributes triggered to exploit Mn‐bim‐MICimz in catalytic hydrogenation of N‐heteroarenes, where efficient hydride (Mn−H) delivery is a key step.
摘要我们在此报告了首个由咪唑亚基图案衍生的介离子碳烯(MIC)-锰(I)配合物 Mn-bim-MICimz。从结构上看,八面体锰(I)配合物 Mn-bim-MICimz 是由一个阴离子苯并咪唑锚定咪唑亚基 MIC 双齿配体(bim-MICimz)和四个 CO 配体组装而成的,并通过核磁共振和傅立叶变换红外光谱、质谱和单晶 X 射线衍射研究进行了详细表征。我们认为,bim-MICimz 配体可与 Mn(I)中心形成强大而稳定的键合,并通过其更强的σ摒弃/更弱的π接受特性提高 Mn(I)中心的电子密度。这些结构和电子特性促使我们利用 Mn-bim-MICimz 催化 N-teroarenes 的氢化反应,其中高效的氢化物(Mn-H)输送是一个关键步骤。