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|Title:||Determination of stability constants of charge transfer complexes of iodine monochloride and certain ethers in solution at 303 K by ultrasonic method|
Ali, S J Askar
Mahaboob, P A Abdul
|Keywords:||Ultrasonic velocity;Formation constants;Donor-acceptor complexes;Iodine monochloride;Ethers|
|Abstract:||Ultrasonic velocities (U), densities (ρ), and coefficient of viscosities (η) have been measured for solutions containing iodine monochloride (ICl) and one of the following ethers in the equimolar concentration in the range 0.001-0.01M at 303 K. Diphenyl ether, 4-chloroanisole, anisole and 1,4-dioxane are used as donors. Dichloromethane, chloroform, carbon tetrachloride and n-hexane have been used as solvents. Acoustical parameters such as adiabatic compressibility (β), absorption coefficient (⍺/f²), internal pressure (πi) and cohesive energy (CE) values are calculated from the measured values of U, ρ and η. The trend in the acoustical parameters establishes the formation of charge transfer complexes between iodine monochloride (acceptor) and ethers (donors). The stability constants (K) are calculated for these complexes. The free energy changes (ΔG) for the formation of these complexes are also calculated from K values. Attempt has been made to correlate the formation constants with polarizability, dielectric strength and dipole moment of the donor and solvent molecules. The free energy of activation (ΔG#) and viscous relaxation time () are found to be almost constant for these complexes indicating the formation of similar charge transfer complexes in these systems.|
|Appears in Collections:||IJPAP Vol.47(02) [February 2009]|
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