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Z. Naturforsch. 2013,
68b, 1340 – 1346
doi:10.5560/ZNB.2013-3180
Preparation, Structural and Spectroscopic Characterization of a Pentaiodide [Rb(12-Crown-4)2]I5
Darstellung, strukturelle und spektroskopische Charakterisierung eines Pentaiodids [Rb(12-Krone-4)2]I5
1 Institut für Anorganische Chemie, Universität zu Köln, Greinstrasse 6, D-50939, Köln, Germany
2 Present addresses: Faculty of Pharmacy and Health Sciences, Ajman University of Science and Technology, P. O. Box 346, Ajman, UAE, and Department of Chemistry, University of Sharjah, P. O. Box 27272, Sharjah, UAE
3 Faculty of Pharmacy and Health Sciences, Ajman University of Science and Technology, P.O. Box 346, Ajman, UAE
Reprint requests to Dr. Zehra Edis. Fax: +971-6-7055221. E-mail:
z.edis@ajman.ac.ae
Received July 2, 2013 / published online November 22, 2013
In Memoriam Professor Karl-Friedrich Tebbe
Dark-green crystals of [Rb(12-crown-4)2]I5 were obtained by the reaction of stoichiometric amounts of RbI, I2 and 12-crown-4 from an ethanol/methanol solution (monoclinic space group P21/n with Z = 4, a = 8.9200(10), b = 24.069(2), c = 13.9950(10) Å and β = 91.984(9)○). The crystal structure contains one independent formula unit consisting of the polyiodide and the cation. The anionic part of the structure is an isolated, V-shaped pentaiodide I5−. The cation is a sandwich complex with two 12-crown-4-molecules surrounding the alkali metal atom.
Key words: Pentaiodide, Crown Ether, Alkali Metal, Crystal Structure, Spectroscopy