Figure 16
From: Microwave dielectric spectroscopy of pure and mixed aromatic ester solvents
Dielectric strength, Δε, and relaxation time, τ, obtained from the fit of experimental dielectric spectra according to two Debye processes and Kirkwood correlation factor, g, for x MB + (1 - x) HEXac binary mixtures at 298.15 K. Continuous lines are plotted to show trends. Parameters from Table 7. Density data required for g calculation obtained from Ref. [6]. ϕ = MB volume fraction. Molecules reported show the gas phase calculated structures of HEXac/MB pairs (B3LYP/6-311++g** theoretical level) through hydrogen bonding and dipolar interaction. Atom color code as in Fig. 3. Blue arrows, calculated molecular dipole moments. The dipole moment reported in the hydrogen bonding panel is the theoretical value for the dimmer.