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Acoustic Studies and Other Acoustic Parameters of Cu(II) Soap Derived from Non-Edible Neem Oil (Azadirecta Indica), in Non-Aqueous Media at 298.15 K

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Ultrasonic speed have been measured in binary and ternary systems containing copper soap derived from neem oil (newly synthesized natural fungicide) in 100% benzene, 80 % and 60% benzene-methanol mixture. From these values, the specific acoustic impedance Z, adiabatic compressibility β, intermolecular free length Lf , apparent molar compressibilityk , molar sound velocity R, primary solvation number Sn have been calculated. The results have beenfitted to Bachem's and Masson's equation. The results have been explained on the basis of intermolecular interactions and indicate that there is sufficient solute–solvent interaction due to which micellar alignment is considerably affected. The decrease in adiabatic compressibility β and intermolecular free length Lf of the Cu(II) neem soap solution with increasing concentration of soap in 100% benzene, 80% and 60% benzene–methanol has been observed which suggest that the non-polar long chains or lypophilic segment of the molecule in the solution are enveloped by a layer of solvent molecules bound and oriented towards lypophilic end. The orientation of the solvent molecules around the solutes may be due to the influence of electrostatic fields of solutes and results in the increase in the internal pressure and in lowering the compressibility of the solution i.e. the solution becomes harder to compress.
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Document Type: Research Article

Publication date: March 1, 2018

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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