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Kinetic Versus Thermodynamic Metalation Enables Synthesis of Isostructural Homo- and Heterometallic Trinuclear Clusters

preprint
submitted on 31.03.2020 and posted on 02.04.2020 by Sung-Min Hyun, Apoorva Upadhyay, Anuvab Das, Corey Burns, Siyoung Sung, Jeremy Beaty, Nattamai Bhuvanesh, Michael Nippe, David Powers
Temperature-dependent metalation of the new hexadentate ligand (tris(5-(pyridin-2-yl)-1H-pyrrol-2-yl)methane; H3TPM) enables the selective synthesis of both mononuclear (i.e. Na(THF)4[Fe(TPM)], kinetic product) and trinuclear (i.e. Fe3(TPM)2, thermodynamic product) complexes. Exposure of Na(THF)4[Fe(TPM)] to FeCl2 or ZnCl2 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.

Funding

Welch Foundation A-1907

Welch Foundation A-1880

U.S. Department of Energy DE-SC0018977

History

Email Address of Submitting Author

powers@chem.tamu.edu

Institution

Texas A&M University

Country

United States

ORCID For Submitting Author

0000-0003-3717-2001

Declaration of Conflict of Interest

No conflict of interest.

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