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Accessing the +IV Oxidation State in Molecular Complexes of Praseodymium

Accessing the +IV Oxidation State in Molecular Complexes of Praseodymium

Aurélien R Willauer, Chad T Palumbo, Farzaneh Fadaei-Tirani, Ivica Zivkovic, Iskander Douair, Laurent Maron, Marinella Mazzanti

J Am Chem Soc. 2020 Mar 25;142(12):5538-5542.

PMID: 32134644

Abstract:

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(OSiPh3)4(THF)3], 1-PrPh, with [N(C6H4Br)3][SbCl6], affords the Pr(IV) complex [Pr(OSiPh3)4(MeCN)2], 2-PrPh, 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-PrPh complex unambiguously confirm the presence of Pr(IV).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP12037295	Praseodymium(III,IV) oxide		12037-29-5	Price

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