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Beilstein J. Org. Chem. 2020, 16, 149–158, doi:10.3762/bjoc.16.17
Graphical Abstract
Scheme 1: Synthesis of oxadiazole derivatives 2 and 4.
Scheme 2: Tautomeric equilibrium of compound 3.
Figure 1: DSC thermograms of fluorinated compounds 2b, 4a and 4b recorded at 5 °C/mn at heating (down traces)...
Figure 2: Optical texture (×10) of liquid crystal phase for fluorinated compounds, (a): SmA phase observed in...
Figure 3: Typical diffractogram observed for compound 2b at 398 K.
Figure 4: Typical diffractogram observed for compound 4a at 411 K.
Figure 5: Conformer of lowest energy of compounds: 4c, conformation A, (a) front view, (a’) top view, (a”) si...
Figure 6: Vector of dipole moment of compounds 4c, 4b and 2b.
Figure 7: Plot of molecular dipole moments. Orange, fluorocarbon compounds; blue, hydrocarbon compounds; gree...