Effects of Side-Chain Substituents in Benzo-15-Crown-5 on Lithium Extraction


Chloroform–water extraction systems have been studied using crown-ethers as extracting agents, namely: benzo-15-crown-5 (B15C5), 2,3-naphtho-15-crown-5 (N15C5), 4′-nitro-benzo-15-crown-5 (NO2B15C5), 4′-tert-butyl-benzo-15-crown-5 (TBB15C5), and 4′-acetyl-benzo-15-crown-5 (AcB15C5). Extraction isotherms of these systems have been obtained, and an attempt made to elucidate the effect of the structure of extracting agent on extraction characteristics. IR-spectroscopic studies have been performed for selected crown-ethers and their complexes in crystalline form and in chloroform solutions, namely, for N15C5, NO2B15C5, AcB15C5, and B15C5. The complexes LiN15C5H2OClO4 (1), LiN15C5H2OI (2), LiNO2B15C5H2OI (3), LiAcB15C5H2OI (4), and LiTBB15C5H2OI (5) have been isolated for the first time and characterized by IR spectroscopy. Single-crystal X-ray data have been obtained for complexes 1–3.

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Correspondence to V. I. Zhilov.

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Original Russian Text © S.V. Demin, N.A. Shokurova, L.I. Demina, L.G. Kuz’mina, V.I. Zhilov, A.Yu. Tsivadze, 2018, published in Zhurnal Neorganicheskoi Khimii, 2018, Vol. 63, No. 1, pp. 111–117.

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Demin, S.V., Shokurova, N.A., Demina, L.I. et al. Effects of Side-Chain Substituents in Benzo-15-Crown-5 on Lithium Extraction. Russ. J. Inorg. Chem. 63, 121–127 (2018). https://doi.org/10.1134/S0036023618010059

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