Abstract

Chitra Manro and Ritu Jain

DOI : http://dx.doi.org/10.13005/ojc/340658

The dielectric properties of 4-Nitroacetanilide have been discussed at four different temperatures in the dilute solution of carbon tetrachloride at a fixed frequency of 9.27GHz. The values of dielectric constant (εʹ), dielectric loss (εʺ), permittivity at an optical frequency (ε_∞) and permittivity at a static frequency (ε₀) are measured at different temperatures and mole fractions. The values of these dielectric parameters are used to calculate the values of relaxation time for overall molecular rotation (τ₁), relaxation time for intramolecular rotation (τ₂), most probable relaxation time (τ₀) and dipole moment (μ) at different temperatures. In the present investigation we have found  higher values of τ₂ which indicate the existence of more than one relaxation process in the solution. The values of energy activation parameters for dielectric relaxation process (∆F_ε, ∆H_ε and ∆S_ε)  and viscous flow process (∆F_η, ∆H_η and ∆S_η) are also determined and compared for 4-Nitroacetanilide with carbon tetrachloride at different temperatures. It is observed that we may treat both  the  process as a rate process.

Dielectric parameters; Dipole moment; Energy Activation Parameters; 4-Nitroacetanilide; Rate Process

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