Dielectric relaxation of amides and tetrahydrofuran polar mixture in C₆H₆ from conductivity measurement under 9.90 GHz electric field

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• 作者：S SAHOO ; S K SIT
• 关键词：Dielectric relaxation ; dipole moment ; binary mixture ; dimer
• 刊名：Pramana
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：88
• 期：1
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics, general; Astronomy, Observations and Techniques; Astrophysics and Astroparticles;
• 出版者：Springer India
• ISSN：0973-7111
• 卷排序：88

文摘

Dielectric relaxation studies of binary (jk) polar mixtures of tetrahydrofuran with N-methyl acetamide, N,N-dimethyl acetamide, N-methyl formamide and N,N-dimethyl formamide dissolved in benzene(i) for different weight fractions (w_jk’s) of the polar solutes and mole fractions (x_j’s) of tetrahydrofuran at 25 ∘C are attempted by measuring the conductivity of the solution under 9.90 GHz electric field using Debye theory. The estimated relaxation time (τ_jk’s) and dipole moment (μ_jk’s) agree well with the reported values signifying the validity of the proposed methods. Structural and associational aspects are predicted from the plot of τ_jk and μ_jk against x_j of tetrahydrofuran to arrive at solute–solute (dimer) molecular association upto x_j=0.3 of tetrahydrofuran and thereafter solute–solvent (monomer) molecular association upto x_j=1.0 for all systems except tetrahydrofuran + N,N-dimethyl acetamide.