Solution Spectroscopic Analysis of Ligand Exchange in Uranium Mono-Oxo Complexes.

Authors

Florian Ressnik, Tyler-Rayne Nero, Maximilian G Bernbeck, Johannes Leisen, Bess Vlaisavljevich, Julie E Niklas, Henry S La Pierre

Published in

Inorganic chemistry. Volume 65. Issue 41. Pages 24331-24342. Oct 19, 2026.

Abstract

Four uranium mono-oxo imidophosphorane complexes with a closed set of systematically changed substituents (pyrrolidine vs piperidine and introduction of one tert-butyl group) are presented. All complexes exhibit an inverse trans-influence (ITI). The rapid exchange of axial and equatorial ligands at room temperature, the unique 31P nuclear magnetic resonance (NMR) handle of the ligands, and the complexes' overall closed-shell singlet ground state facilitate the determination of ligand-exchange barriers via variable-temperature (VT) and exchange spectroscopy (EXSY) NMR. Computational analysis delineates electronic and steric contributions to the experimentally determined exchange barriers.

PMID:
42895408
Bibliographic data and abstract were imported from PubMed on 19 Oct 2026.

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