Studies of solute-solvent interactions and miceller behaviour of complexes of copper (II) palmitate with substituted phenylthiourea and 2-amino benzothiazole in methanol-benzene mixture

Abstract

In this work, synthesis of copper (II) surfactants followed by the complexation of each other with the molar ratio of 1:2 dissolving in ethanol have been reported. The purity of the resulting complexes of the general formula-CP(PTU)(T), CP(BTA)(T) was checked by thin layer chromatography and characterized on the basis of elemental analysis. Their spectral studies are also included and data suggest that Cu (II) phenylthiourea mixed system binds through the donor ability of nitrogen to transition metal. The magnetic moment studies suggest the dimeric nature of the complexes. IR, NMR, ESR spectral details confirm that complexation has taken place successfully and dada suggest that the complexes possess elongated octahedral geometry. Density, Molar Volume, Apparent Molar Volume of these complexes was investigated in non-aqueous solvent at various concentrations by Springel Pyknometer to understand the nature, critical micelle concentration and micelle characteristics of the complexes. Overall, the CMC values were found to be decreased with increasing average molecular weight of soap complex. The solute - solute interactions were found to be greater before CMC whereas solute-solvent interactions were found greater after CMC.