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(18-Crown-6)potassium 0.84(diiodobromide) 0.16(dibromoiodide) and diaqua(18-Crown-6)chlororubidium: Syntheses and crystal structures

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Abstract

New host-guest compounds are synthesized and studied by X-ray diffraction analysis: (18-crown-6) potassium 0.84(diiodobromide) 0.16(dibromoiodide), [K(18-crown-6)]+ · (Br1.16I1.84)−, (I) and diaqua (18-crown-6)chlororubidium, [RbCl(18-crown-6)(H2O)2], (II). The crystals of compound I are monoclinic (space group P21/n, a = 9.157 Å, b = 8.589 Å, c = 14.072 Å, β = 102.27°, Z = 2). The structure of compound II is orthorhombic (space group Pnma, a = 9.813 Å, b = 15.231 Å, c = 12.629 Å, Z = 4). The structures are solved by a direct method and refined by the full-matrix anisotropic least squares to R = 0.062 (I) and 0.079 (II) for 3149 (I) and 2840 (II) independent reflections (CAD-4 automated diffractometer, λMoK α radiation). The crystal structures of compounds I and II are different: compound I is built of infinite chains of the alternating cations [K(18-crown-6)]+ and mixed halide anions linked by weak coordination bonds K-Br or K-I, whereas individual molecules [RbCl(18-crown-6)(H2O)2] form structure II.

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    A. N. Chekhlov

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  1. A. N. Chekhlov
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Correspondence to A. N. Chekhlov.

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Original Russian Text © A.N. Chekhlov, 2009, published in Zhurnal Neorganicheskoi Khimii, 2009, Vol. 54, No. 8, pp. 1385–1391.

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Chekhlov, A.N. (18-Crown-6)potassium 0.84(diiodobromide) 0.16(dibromoiodide) and diaqua(18-Crown-6)chlororubidium: Syntheses and crystal structures. Russ. J. Inorg. Chem. 54, 1316–1322 (2009). https://doi.org/10.1134/S0036023609080221

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  • DOI: https://doi.org/10.1134/S0036023609080221

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