2020/03/05 by Aurélien R. Willauer, Chad T. Palumbo, Farzaneh Fadaei‐Tirani +4 · 2 citations
Materials Science · Chemistry · #Lanthanide and Transition Metal Complexes #Magnetism in coordination complexes #Organometallic Complex Synthesis and Catalysis
paper · doi:10.1021/jacs.0c01204
openalex publication_date 2020/03/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Out of the 14 lanthanide (Ln) ions, molecular complexes of Ln(IV) were known only for cerium and more recently terbium. Here we demonstrate that the +IV oxidation state is also accessible for the large praseodymium (Pr) cation. The oxidation of the tetrakis(triphenysiloxide) Pr(III) ate complex, [KPr(OSiPh 3 ) 4 (THF) 3 ], 1-Pr Ph, with [N(C 6 H 4 Br) 3 ][SbCl 6 ], affords the Pr(IV) complex [Pr(OSiPh 3 ) 4 (MeCN) 2 ], 2-Pr Ph, which is stable once isolated. The solid state structure, UV–visible spectroscopy, magnetometry, and cyclic voltammetry data along with the DFT computations of the 2-Pr Ph complex unambiguously confirm the presence of Pr(IV).