Abstract
New ionic antimony complexes with a three-coordinated carbon atom in their cations, namely, [(Ph4SbO)3C]+[OSO2C6H3(NO2)2-2,4]– ⋅ 3PhH (32%) and [(p-Tol4SbO)3C]+Br– (traces), have been isolated when the products of reactions between pentaphenylantimony and 2,4-dinitrobenzenesulfonic acid and between penta(p-tolyl)antimony and hydrobromic acid were crystallized from a benzene–octane mixture in air along with the target products, such as tetraphenylantimony 2,4-dinitrobenzenesulfonate and tetra(p-tolyl)antimony bromide. The cations have nearly planar СO3Sb3 cores. The ОСО and COSb angles are close to 120°, whereas the C–O bonds vary within 1.277(4)–1.290(3) Å, and the Sb–O distances (2.266(2)–2.299(2) Å) exceed the sum of the covalent radii of antimony and oxygen atoms. It has been experimentally established that these complexes are formed as a result of interactions between the target products of the above-mentioned reactions with bis(tetraarylantimony) carbonates, which are also formed under the conditions of these reactions from pentaarylantimony and atmospheric carbon dioxide.
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This work was supported by the Ministry of Education and Science of the Russian Federation (grant no. 4.6151.2017/8.9).
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Translated by E. Glushachenkova
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Sharutin, V.V., Sharutina, O.K. & Efremov, A.N. Arylantimony Derivatives of Three-Coordinated Carbon. Russ. J. Inorg. Chem. 65, 45–51 (2020). https://doi.org/10.1134/S0036023620010155
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DOI: https://doi.org/10.1134/S0036023620010155