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Malaysian Journal of Chemistry, 2017, Vol. 19(2), 99 – 110

Ultrasonic Studies of Cu (II) Soap Derived from Seed Oil of Karanj
(Pongamia pinnata) in Non-aqueous Binary and Ternary Systems at 298.15 K 

Shema Khan1, Rashmi Sharma2 and Arun Kumar Sharma2
1Department of Chemistry, Government P.G. College, Dausa 303303, Rajastan, India
2Department of Chemistry, S.P.C. Government College, Ajmer 30500, Rajastan, India

*Corresponding author: (e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)

 Received: May 2017; Accepted: July 2017

ABSTRACT

Ultrasonic speed was measured in non-aqueous binary and ternary systems containing copper soap derived from karanj oil (newly synthesized natural fungicide) in 100% benzene, 80%, and 60% methanol-benzene mixture. The acoustic behaviour was studied to understand and analyze the micellar features of the solute in a ternary system which might provide valuable information for its applications in different fields. From ultrasonic velocity values, the specific acoustic impedance Z, adiabatic compressibility β, intermolecular free length Lf, apparent molar compressibility k, molar sound velocity R, primary solvation number Sn  were calculated. The results were fitted to Bachem’s and Masson equation. The results were explained by intermolecular interactions and indicated that there was sufficient solute–solvent interaction due to which micellar alignment was considerably affected. The decrease in adiabatic compressibility, β, and intermolecular free length Lf of the Cu (II) karanj soap solution with increasing concentration of soap in 100% benzene 80% benzene–methanol, and 60% benzene–methanol was observed which suggested that the non-polar long chains or lypophilic segment of the molecules in the solution were enveloped by a layer of solvent molecules bound and oriented towards lypophilic end. 

Key words: Copper soap; methanol; benzene; karanj oil; ultrasonic; intermolecular interactions

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