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Second crystal modification of 1,10-diazonia-18-crown-6 dichloride

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Abstract

The second crystal modification (II) of 1,10-diazonia-18-crown-6 dichloride [H2DA18C6]2+·2Cl−, where [H2DA18C6]2+ is the 1,10-diaza-18-crown-6 dication (DA18C6) with two protonated nitrogen atoms, was investigated by XRD. The monoclinic modification (II) (space group P21/n, a = 9.600 Å, b = 5.689 Å, c = 15.749 Å, β = 91.03°, Z = 2) was solved by direct methods and refined by full-matrix least squares analysis in an anisotropic approximation to R = 0.032 for all 2494 independent reflections collected (CAD-4 automatic diffractometer, λMoK α). In modification II, the conformation of the DA18C6 dication and the ion packing differ from those in triclinic modification I investigated previously.

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Authors and Affiliations

  1. Institute of Chemical Physics Problems, Russian Academy of Sciences, Chernogolovka

    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 Copyright © 2007 by A. N. Chekhlov

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Translated from Zhurnal Strukturnoi Khimii, Vol. 48, No. 6, pp. 1226–1229, November–December, 2007.

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Chekhlov, A.N. Second crystal modification of 1,10-diazonia-18-crown-6 dichloride. J Struct Chem 48, 1160–1163 (2007). https://doi.org/10.1007/s10947-007-0187-5

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  • DOI: https://doi.org/10.1007/s10947-007-0187-5

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