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Z. Naturforsch. 2012, 67b, 447 – 451
doi:10.5560/ZNB.2012-0079
Synthesis, Structure and Spectroscopy of a New Polyiodide in the α,ω-Diazaniumalkane Iodide/Iodine System
Guido J. Reiss and Martin van Megen
Institut für Anorganische Chemie und Strukturchemie, Lehrstuhl für Material- und Strukturforschung, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
Reprint requests to G. J. Reiss; Fax: 0049-211-81-14146. E-mail: reissg@hhu.de
Received March 18, 2012 / published online May 31, 2012
The reaction of 1,4-diaminobutane with hydroiodic acid in the presence of iodine yields the title compound 1,4-diazaniumbutane tetraiodide, C4H14N2I4 (1). The title compound has been structurally characterized by crystallographic and spectroscopic methods (Raman and IR). 1 is built up by centrosymmetric 1,4-diazaniumbutane cations in all-trans conformation and linear I42− anions. Both, cations and anions are located on centers of inversion (2/m) in the monoclinic space group C2/m. The hydrogen bonds between the azanium groups and the terminal iodine atoms of the I42− anions lead to a three-dimensional framework. The structural parameters of the tetraiodide anion, derived from X-ray crystallographic data are in excellent agreement with the results from Raman spectroscopy. The Raman and IR data for the analogous α,ω-diazaniumalkane tetraiodide salts (H3N-(CH2)6-NH3)I4 (2) and (H3N-(CH2)7-NH3)I4 (3) are reported, and the structures of 1, 2 and 3 are compared.
Key words: Polyiodide, α, ω-Diazaniumalkane, Tetraiodide, Crystal Structure, Raman Spectroscopy
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