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Nitrato Complexes of Platinum(IV) with Cesium Cations

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Abstract

Two novel platinum(IV) nitrate complexes, Cs2[Pt(NO3)6] (1) and Cs2[Pt2(μ-OH)2(NO3)8] (2), are prepared by adding cesium nitrate to a solution of platinum(IV) hydroxide in nitric acid. It is established that the main reaction product is the Cs2[Pt(NO3)6] mononuclear complex, while Cs2[Pt2(μ-OH)2(NO3)8] is formed only after the removal of the first portion of the precipitate and subsequent long-term storage of the mother liquor. The structures of the salts are studied by XRD. Crystal data for Cs2[Pt(NO3)6] (1): a = 9.7346(3) Å, b = 11.5072(3) Å, c = 13.6813(2) Å, space group Pbcn, Z = 4. Crystal data for Cs2[Pt2(μ-OH)2(NO3)8] (2): a = 7.0889(2) Å, b = 14.2216(6) Å, c = 10.7931(4) Å, β = 91.776(1)°, space group P21/n, Z = 2. It is shown that NO3 ligands in (1) occupy atypical positions. The geometry of the complex anion in (2) is similar to the one described for (Me4N)2[Pt2(μ-OH)2(NO3)8]. Powdered samples of (1) and those of a mixture of (1) and (2) are characterized by powder XRD and IR spectroscopy. The obtained compounds are shown to be stable upon long-term storage in air.

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Funding

The synthesis and characterization of platinum compounds was funded by the Russian Science Foundation (project No. 21-73-10038). The crystal structure determination was funded by the Ministry of Science and Higher Education of the Russian Federation, project No. 121031700315-2.

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  1. Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

    P. A. Topchiyan, N. V. Kuratieva & D. B. Vasilchenko

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  1. P. A. Topchiyan
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  2. N. V. Kuratieva
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  3. D. B. Vasilchenko
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Correspondence to P. A. Topchiyan.

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Russian Text © The Author(s), 2023, published in Zhurnal Strukturnoi Khimii, 2023, Vol. 64, No. 12, 119510.https://doi.org/10.26902/JSC_id119510

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Topchiyan, P.A., Kuratieva, N.V. & Vasilchenko, D.B. Nitrato Complexes of Platinum(IV) with Cesium Cations. J Struct Chem 64, 2378–2385 (2023). https://doi.org/10.1134/S0022476623120090

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