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Unsupported Lanthanide–Transition Metal Bonds: Ionic vs Polar Covalent?

https://doi.org/10.1021/acs.inorgchem.1c00285

Yang, Xin ; Burns, Corey P. ; Nippe, Michael ; Hall, Michael B. ( July 2021 , Inorganic Chemistry)

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Kinetic versus thermodynamic metalation enables synthesis of isostructural homo- and heterometallic trinuclear clusters

https://doi.org/10.1039/d0cc02346a

Hyun, Sung-Min ; Upadhyay, Apoorva ; Das, Anuvab ; Burns, Corey P. ; Sung, Siyoung ; Beaty, Jeremy D. ; Bhuvanesh, Nattamai ; Nippe, Michael ; Powers, David C. ( June 2020 , Chemical Communications)
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Temperature-dependent metalation of the new hexadentate ligand (tris(5-(pyridin-2-yl)-1 H -pyrrol-2-yl)methane; H 3 TPM) enables the selective synthesis of both mononuclear ( i.e. Na(THF) 4 [Fe(TPM)], kinetic product) and trinuclear ( i.e. Fe 3 (TPM) 2 , thermodynamic product) complexes. Exposure of Na(THF) 4 [Fe(TPM)] to FeCl 2 or ZnCl 2 triggers cluster expansion to generate homo- or heterometallic trinuclear complexes, respectively. The developed approach enables systematic variation of ion content in isostructural metal clusters via programmed assembly.
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Structure and Magnetization Dynamics of Dy−Fe and Dy−Ru Bonded Complexes

https://doi.org/10.1002/anie.201803761

Burns, Corey P. ; Yang, Xin ; Wofford, Joshua D. ; Bhuvanesh, Nattamai S. ; Hall, Michael B. ; Nippe, Michael ( July 2018 , Angewandte Chemie International Edition)

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Towards understanding of lanthanide–transition metal bonding: investigations of the first Ce–Fe bonded complex

https://doi.org/10.1039/C8CC05243C

Burns, Corey P. ; Yang, Xin ; Sung, Siyoung ; Wofford, Joshua D. ; Bhuvanesh, Nattamai S. ; Hall, Michael B. ; Nippe, Michael ( January 2018 , Chemical Communications)

The syntheses, structural, and magnetic characterization of three new organometallic Ce complexes stabilized by PyCp 2 2− (PyCp 2 2− = [2,6-(CH 2 C 5 H 3 ) 2 C 5 H 3 N] 2− ) are reported. Complex 1 provides the first example of a crystallographically characterized unsupported Ce–Fe bond in a molecular compound. Results from IR spectroscopy and computational analyses suggest weaker Fe → Ce electron-donation than in a previously reported Dy–Fe bonded species.
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