Simple amphiphilic liquid crystalline
N-alkylimidazolium salts. A new solvent system providing a
partially ordered environmentCrystal data for
[C14H29-imH][NO3]:
C17H33N3O3, M =
303.44, triclinic, a = 8.962(3), b = 19.793(18),
c = 22.363(7) Å, α = 99.606(17),
β = 92.371(18), γ = 98.307(18)°,
V = 3862(2) Å3, T = 298 K, space group
P
, Z = 10, μ = 0.090
mm−1, σcalcd = 1.305 mg
m−3, 1.52 < θ < 25.00. Of 16247
reflections measured, 13442 were unique. Data were collected on a Siemens
P4 diffractometer with graphite monochromatized Mo-Kα radiation
(λ = 0.71073 Å) in ω scan mode. The structure
was solved by direct methods and refined (based on F2
using all independent data) by full matrix least squares methods (Siemens
SHELXTL V. 5.03). All the non-hydrogen atoms were refined anisotropically.
The hydrogen atoms, located by Fourier difference synthesis, were
isotropically refined with a common thermal parameter. R values
are reported for R1 = 0.0505 (based on observed data, I
> 2σ) and wR2 = 0.1390 (based on all data). CCDC
182/1768. See http://www.rsc.org/suppdata/cc/b0/b004462h/ for
crystallographic files in .cif format. 1H-NMR (ppm,
CDCl3, 25 °C): 0.87 (t, 3J = 7 Hz,
–CH3, 3H), 1.25–1.32 (m, –CH2,
22H), 1.87 (m, –CH2, 2H), 4.28 (t, 3J
= 7 Hz, –NCH2, 2H), 7.11 (s, CH, 1H), 7.40 (s, –CH,
1H), 9.36 (s, –CH, 1H), 15.53 (s, –NH, 1H). Anal. Calcd. for
C17H33N3O3: C 62.35; H 10.16; N
12.83. Found: C 62.17; H 10.14; N 12.76%.
Abstract
Easily accessible liquid crystals of 1-alkylimidazolium salts having a bilayer structure, are good solvents providing a partially ordered reaction environment.