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Title: A Four‐Coordinate Pr 4+ Imidophosphorane Complex
Abstract The imidophosphorane ligand, [NPtBu3]−(tBu=tert‐butyl), enables isolation of a pseudo‐tetrahedral, tetravalent praseodymium complex, [Pr4+(NPtBu3)4] (1‐Pr), which is characterized by a suite of physical characterization methods including single‐crystal X‐ray diffraction, electron paramagnetic resonance, and L3‐edge X‐ray near‐edge spectroscopies. Variable‐temperature direct‐current magnetic susceptibility data, supported by multiconfigurational quantum chemical calculations, demonstrate that the electronic structure diverges from the isoelectronic Ce3+analogue, driven by increased crystal field. The four‐coordinate environment around Pr4+in1‐Pr, which is unparalleled in reported extended solid systems, provides a unique opportunity to study the interplay between crystal field splitting and spin‐orbit coupling in a molecular tetravalent lanthanide within a pseudo‐tetrahedral coordination geometry.  more » « less
Award ID(s):
1943452
PAR ID:
10628372
Author(s) / Creator(s):
; ; ; ; ; ;
Publisher / Repository:
Wiley
Date Published:
Journal Name:
Angewandte Chemie International Edition
ISSN:
1433-7851
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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