Figure 3. Typical experimental static dielectric constants of some nonpolar compounds.

(a). Measured static dielectric constants of various nonpolar or symmetric molecules.^52,53 Fixed-charge forcefields give ε ≈ 1 for each species; for example, we calculated ε = 1.0030 ± 0.0002 for octane. (b). A congeneric series of chloro-substituted methanes have static dielectric constants between 2 and 13. Reported dielectric constants are at near-ambient temperatures.