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Bisoxalateiridium Acid, a New Rare Example of a Crystal Complex Acid with the \({{\text{H}}_{5}}\text{O}_{2}^{+}\) Cation, and Its Sodium Salt

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Abstract

New coordination compounds, sodium trans-bis(oxalato)diaqua-iridate(III) dihydrate Na[Ir(H2O)2(C2 O4)2]·2H2O and trans-bis(oxalato)diaquairidic acid H5O2[Ir(H2O)2(C2O4)2], are prepared. The substances are characterized by single-crystal XRD, powder XRD, and IR spectroscopy. Crystal data for Na[Ir(H2O)2(C2O4)2]·2H2O: \(P\bar{1}\) space group, a = 5.2456(7) Å, b = 6.4999(8) Å, c = 8.237(1) Å, α = 98.162(6)°, β = 92.005(6)°, γ = 112.043(4)°, Z = 1; for H5O2[Ir(H2O)2(C2O4)2]: \(P\bar{1}\) space group, a = 4.6903(2) Å, b = 6.0053(3) Å, c = 9.1527(5) Å, α = 75.843(2)°, β = 84.270(2)°, γ = 82.413(2)°, Z = 1. The coordination sphere of iridium is a distorted octahedron. The Na[Ir(H2O)2(C2O4)2]·2H2O structure is similar to those of MC2O4·2H2O divalent metal oxalates (M = Mn, Fe, Co, Ni, Cu, Zn). The \({{\text{H}}_{\text{5}}}\text{O}_{2}^{+}\) Zundel cation in the trans-bis(oxalato)iridic acid is located discretely.

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Funding

This work was funded by the Russian Science Foundation (project No. 21-73-20203).

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Authors and Affiliations

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

    T. V. Zaitseva, A. V. Zadesenets, E. Y. Filatov, A. S. Sukhikh & S. V. Korenev

  2. Novosibirsk State University, Novosibirsk, Russia

    T. V. Zaitseva

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  1. T. V. Zaitseva
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Russian Text © The Author(s), 2024, published in Zhurnal Strukturnoi Khimii, 2024, Vol. 65, No. 2, 122220.https://doi.org/10.26902/JSC_id122220

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Zaitseva, T.V., Zadesenets, A.V., Filatov, E.Y. et al. Bisoxalateiridium Acid, a New Rare Example of a Crystal Complex Acid with the \({{\text{H}}_{5}}\text{O}_{2}^{+}\) Cation, and Its Sodium Salt. J Struct Chem 65, 301–312 (2024). https://doi.org/10.1134/S0022476624020082

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