3,6-Diaza-octane-1,8-diaminium diiodide

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

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The asymmetric unit of the title salt, C6H20N4 2+·2I -, comprises half a 3,6-diaza-octane-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 inter-molecular inter-actions: two H atoms of the ammonium group form inter-actions with two I- anions and the H atom of the secondary amine forms a weak inter-action 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.

Original languageEnglish
Pages (from-to)o2387
JournalActa Crystallographica Section E: Structure Reports Online
Issue number8
Publication statusPublished - Aug 2012
Externally publishedYes


  • data-to-parameter ratio = 39.3
  • mean σ(C-C) = 0.002 Å
  • R factor = 0.023
  • single-crystal X-ray study
  • T = 180 K
  • wR factor = 0.053

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


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