09/17/2026
Recently Published to the Journal of the American Chemical Society (JACS):
“Doubly Reduced Arene as a Platform for Th(II) and Zr(II) Synthons: M–Arene δ-Bonding Governs Divergent Two-Electron Reactivity”
https://doi.org/10.1021/jacs.6c13463
In this work, Dr. Ian A. Haltom, Dr. Chad Studvick, Dr. Sourav Dey, Prof. Ivan Popov, and Prof. James Boncella show how arene can serve as an electron reservoir, enabling access to Th(II) and Zr(II) synthons through M–arene δ-bonding. Despite their structural similarities, the valence-isoelectronic Th and Zr complexes display markedly different two-electron reactivity toward benzyl bromide, azobenzene, and H₂. Whereas DFT showed only minor differences in M–arene π and δ interactions, CASSCF reveals clear differences in the arene π* orbital populations, as well as in the magnitude and orbital character of the metal contributions to the M–arene δ interaction.
Congratulations to Dr. Ian A. Haltom, Dr. Chad Studvick, Dr. Sourav Dey, Prof. Ivan Popov, and Prof. James Boncella!