3,6-Diazaoctane-1,8-diaminium diiodide

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Authors

Cukrowski, Ignacy
Adeyinka, Adedapo S.
Liles, David C.

Journal Title

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Volume Title

Publisher

International Union of Crystallography

Abstract

The asymmetric unit of the title salt, C6H20N4 2+ 2I , comprises half a 3,6-diazaoctane-1,8-diaminium dication plus an I anion. The dications are symmetrical and lie across crystallographic centres of inversion. In the crystal, the ions form a network involving mainly weak N—H I intermolecular interactions: two H atoms of the ammonium group form interactions with two I anions and the H atom of the secondary amine forms a weak interaction with a third I cation. The third ammonium H atom is hydrogen bonded to a secondary amine of an adjacent cation. The backbone of the cation does not form a uniformly trans chain, but is ‘kinked’ [C—N—C—C torsion angle = 71.5 (2) ], probably to accommodate the direct hydrogen bond between the ammonium group and the secondary amine in an adjacent cation.

Description

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: JJ2132).

Keywords

Single-crystal X-ray study, T = 180 K, Mean (C–C) = 0.002 A, R factor = 0.023, wR factor = 0.053, Data-to-parameter ratio = 39.3

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Citation

Cukrowski, I, Adeyinka, AS & Liles, DC 2012, '3,6-Diazaoctane-1,8-diaminium diiodide', Acta Crystallographica Section E-Structure Reports Online, vol. E68, no. o2387, pp. sup-1-5.