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Inorganics 2013, 1(1), 3-13; doi:10.3390/inorganics1010003

I62− Anion Composed of Two Asymmetric Triiodide Moieties: A Competition between Halogen and Hydrogen Bond

Institut für Anorganische Chemie und Strukturchemie, Lehrstuhl für Material- und Strukturforschung, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
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Received: 31 July 2013 / Revised: 25 September 2013 / Accepted: 21 October 2013 / Published: 31 October 2013
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Abstract

The reaction of 1,8-diaminooctane with hydroiodic acid in the presence of iodine gave a new polyiodide-containing salt: 1,8-diaminiumoctane bis(triiodide), (H3N-(CH2)8-NH3)[I3]2. The title compound has been characterized by crystallographic and spectroscopic methods. The polyiodide ion is the first example of a hydrogen bonded I62− dianion consisting of two very asymmetric triiodide components with I−I distances of 2.7739(4) and 3.1778(4) Å interacting by a weak halogen bond (I···I: 3.5017(2) Å). The structural parameters of the triiodide anions, derived from X-ray crystallographic data, are in good agreement with the Raman and Far-IR spectroscopic results. View Full-Text
Keywords: polyiodide; 1,8-diaminiumoctane; triiodide; crystal structure; IR and Raman spectroscopy polyiodide; 1,8-diaminiumoctane; triiodide; crystal structure; IR and Raman spectroscopy
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MDPI and ACS Style

van Megen, M.; Reiss, G.J. I62− Anion Composed of Two Asymmetric Triiodide Moieties: A Competition between Halogen and Hydrogen Bond. Inorganics 2013, 1, 3-13.

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