Dielectric relaxation in some substituted benzaldehydes in benzene at different temperatures.

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概要

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• Measurements of the relative permittivity at 1 MHz and 9.27 GHz, and of the refractive index for the sodium-D line have been made for (A) <I>o</I>-nitrobenzaldehyde, (B) <I>m</I>-nitrobenzaldehyde, (C) <I>m</I>-chlorobenzaldehyde, and (D) <I>p</I>-chlorobenzaldehyde, at 15, 25, 35, and 45 °C in dilute solutions of benzene. The dielectric relaxation times τ<SUB>(1)</SUB> and τ<SUB>(2)</SUB> have been calculated using the Higasi, Koga, and Nakamura method. The results suggest that the relaxation time for the overall rotation decreases at a greater rate than the one for the internal rotation. The thermodynamic energy parameters have been calculated. The results show that the freedom of rotation of the –CHO group increases around the C<SUB>alip</SUB>–C<SUB>arom</SUB> bond as an electronegative substituent moves from the <I>o</I>- to <I>m</I>- to <I>p</I>- positions.

• 公益社団法人 日本化学会の論文

著者

• Singh Buta

  Department Of Physics Punjabi University

• Vij J.

  Department of Physics, Panjab University

関連論文

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• Dielectric Relaxation and Molecular Structure. II Dielectric Relaxation in Dibutyl Ether, Diphenyl Ether and Benzophenone in Various Nonpolar Solvents
• Dielectric Relaxation in Substituted Benzaldehydes
• Dielectric relaxation in some substituted benzaldehydes in benzene at different temperatures.

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