ISSN:
0044-2313
Keywords:
Polyiodide
;
triiodide
;
urotropinium triiodide
;
crystal structure
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Studies on Polyhalides. 17. Preparation and Crystal Structure of Urotropinium Triiodide, UrHI3Urotropinium triiodide C6H13N4I3 is formed by the reaction of equimolar amounts of urotropinium iodide and iodine in tBuOH as red-brown cube-like crystals melting at 402 K under decomposition. The compound crystallizes monoclinically in the space group P21/c with a = 952.0(3) pm, b = 1 160.2(6) pm, c = 1 149.9(4) pm, β = 92.22(3)° and Z = 4. The till now not described crystal structure (R = 0.027 for 1 860 observed reflexes) contains urotropinium ions UrH+ and slightly distorted triiodide ions I3-(d(I - I) = 292.3(1), 294.1(1) pm, ϕ(I - I - I) = 178.27(2)°) which are linked to ion pairs by a rather short contact (d(I … I) = 389.0(1) pm, ϕ(I - I … I) = 149.12(2)°).
Notes:
Urotropiniumtriiodid C6H13N4I3 fällt bei der Umsetzung äquimolarer Mengen Urotropiniumiodid und Iod aus tBuOH in rotbraunen würfelähnlichen Kristallen an, die bei 402 K unter Zersetzung schmelzen. Die Substanz kristallisiert in der monoklinen Raumgruppe P21/c mit a = 952,0(3) pm, b = 1 160,2(6) pm, c = 1 149,9(4) pm, β = 92,22(3)° und Z = 4. Die bisher nicht beschriebene Kristallstruktur (R = 0,027 für 1 860 beobachtete Reflexe) enthält Urotropiniumionen UrH+ und geringfügig verzerrte Triiodidionen I3-(d(I - I) = 292,3(1), 294,1(1) pm, ϕ(I - I - I) = 178,27(2)°), die über einen kurzen Kontakt Ionenpaare bilden (d(I … I) = 389,0(1) pm, ϕ(I - I … I) = 149,12(2)°).
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19956210211
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