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A Bis-(carbone) Pincer Ligand and Its Coordinative Behavior toward Multi-Metallic Configurations
Bamlaku Semagne Aweke1,2,3, Cheng-Han Yu1, Minna Zhi4
1Institute of Chemistry, Academia Sinica, Taipei, Taiwan, ROC.
Abstract:
Carbones are divalent carbon(0) species that contain two lone pairs of electrons. Herein, we have prepared the first known stable and isolable free bis-(carbone) pincer framework with a well-defined solid-state structure. This bis-(carbone) ligand is an effective scaffold for forming monometallic (Ni and Pd) and trinuclear heterometallic complexes with Au-Pd-Au, Au-Ni-Au, and Cu-Ni-Cu configurations. Sophisticated quantum-theoretical analyses found that the metal-metal interactions are too weak to play a significant role in upholding these multi-metallic configurations; rather, the four lone pairs of electrons within the bis-(carbone) framework are the main contributors to the stability of the complexes.
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