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Preparation and structural and spectroscopic characterization of triiodides [M(12-Crown-4)2]I3with M = Na and Rb [Darstellung und strukturelle und spektroskopische charakterisierung der triiodide [M(12-Krone-4)2]I3 mit M = Na und Rb]
Published in De Gruyter
Volume: 69
Issue: 9-10
Pages: 995 - 1002
Reddish-brown crystals of [Na(12-crown-4)2]I3 (1) and [Rb(12-crown-4)2]I3 (2) were formed through the reaction of NaI or RbI, I2 and 12-crown-4 in ethanol. Both structures are triclinic, space group P1¯ with Z = 2. The lattice parameters are a = 8.505(2), b = 14.280(3), c = 10.695(2) Å and α = 89.86(2)°, β = 80.00(2)° and γ = 85.90(2)°; and a = 10.694(2), b = 11.598(2), c = 12.718(2) Å and α = 71.00(2)°, β = 86.97(2)° and γ = 67.710(10)° for 1 and 2, respectively. Both crystal structures contain one independent complex cation without crystallographic symmetry. The anionic parts of both structures consist of two crystallographically independent, isolated, triiodide anions I3- with crystallographic inversion symmetry. The cations are distorted sandwich-like complexes with two 12-crown-4 molecules surrounding the alkali metal atom in the center. © 2014 Verlag der Zeitschrift für Naturforschung, Tübingen.
About the journal
JournalData powered by TypesetZeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
PublisherData powered by TypesetDe Gruyter
Open AccessNo
Concepts (6)
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    Crown ether
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    Alkali metal
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    Crystal structure
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    Phase transitions