Tetranitratopalladate(II) Salts with Tetraalkylammonium Cations: Structural Aspects, Reactivity, and Applicability toward Palladium Deposition for Catalytic Applications

A series of salts (R4N)2[Pd­(NO3)4] (R = CH3, C2H5, n-C3H7; 1–3) were synthesized in high yield from a nitric acid solution of palladium. The salts were characterized by a combination of physicochemical methods, and their crystal structures were determined by X-ray diffraction. The conformation of t...

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Published in:Inorganic chemistry 2021-03, Vol.60 (5), p.2983-2995
Main Authors: Vasilchenko, Danila, Topchiyan, Polina, Berdyugin, Semen, Plyusnin, Pavel, Shayapov, Vladimir, Baidina, Iraida, Komarov, Vladislav, Bukhtiyarov, Andrey, Gerasimov, Evgeny
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Language:English
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Summary:A series of salts (R4N)2[Pd­(NO3)4] (R = CH3, C2H5, n-C3H7; 1–3) were synthesized in high yield from a nitric acid solution of palladium. The salts were characterized by a combination of physicochemical methods, and their crystal structures were determined by X-ray diffraction. The conformation of the [Pd­(NO3)4]2– anion was studied in detail using crystal structure data and density functional theory calculations. A combination of nonhygroscopicity and stability under normal conditions, together with thermolability, high solubility in various solvents, and the lability of nitrato ligands, makes salts 1–3 valuable starting materials for the synthesis of Pd compounds and the preparation of Pd-containing catalysts. In this work, these applications were illustrated by the synthesis of heteroleptic Pd­(II) nitrato complexes with N-donor ligands and the preparation of Pd0.1Ni0.9/SiO2 catalysts, which worked well in H2 generation from hydrazine hydrate. Generally, it was shown that up to several weight percent of Pd can be deposited on various oxide/hydroxide supports using a straightforward chemisorption procedure from acetone solutions of 1–3.
ISSN:0020-1669
1520-510X
DOI:10.1021/acs.inorgchem.0c03038