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Journal Article

Teaching the Cummins Complex Heterodimerization: Formation of Unorthodox Heteroleptic X3MoMoY3 Dimers with Ultralong Metal-Metal Triple Bonds

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Rütter,  Daniel
Research Department Fürstner, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Nöthling,  Nils
Service Department Lehmann (EMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Leutzsch,  Markus
Service Department Farès (NMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Fürstner,  Alois
Research Department Fürstner, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Rütter, D., Nöthling, N., Leutzsch, M., & Fürstner, A. (2024). Teaching the Cummins Complex Heterodimerization: Formation of Unorthodox Heteroleptic X3MoMoY3 Dimers with Ultralong Metal-Metal Triple Bonds. ChemRxiv: the Preprint Server for Chemistry. doi:10.26434/chemrxiv-2024-00cnb.


Cite as: https://hdl.handle.net/21.11116/0000-000F-EFBE-F
Abstract
Attempts to stabilize mononuclear trigonal-planar Mo(+3) complexes by (tripodal) silanolates or alkoxides, which had recently been shown to synergize exceedingly well with high valent molybdenum or tungsten alkylidynes, afforded unsymmetrical dimolybdenum complexes of the general type [X3MoMoY3]; not only is this ligand pattern unprece-dented, but these dimers incorporate the intact Cummins complex [(tBu)(Ar)N]3Mo (Ar = 3,5-dimethylphenyl), which is famous for not engaging in metal-metal triple bonding otherwise. The remarkable ease of heterodimerization likely reflects a pronounced kinetic selectivity. The new complexes were characterized by crystallographic and spectroscopic means; they show highly deshielded 95Mo NMR signals and comprise unusually long yet robust MoMo bonds.