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IJPAP Vol.44(12) [December 2006] >


Title: Determination of stability constants of charge transfer complexes of iodine monochloride and certain ethers in solution at 303 K by ultrasonic method
Authors: Kannappan, V
Ali, S J Askar
Mahaboob, P A Abdul
Keywords: Ultrasonic velocity
Formation constants
Donor-acceptor complexes
Iodine monochloride
Ethers
Issue Date: Dec-2006
Publisher: CSIR
IPC CodeB01J19/10
Abstract: Ultrasonic velocities (U), densities (ρ), and coefficient of viscosities (η) are measured for solutions containing iodine monochloride (ICl) and one of the following ethers in equimolar concentration in the range 0.001-0.01M at 303 K. The diphenyl ether, 4-chloroanisole, anisole and 1,4-dioxane are used as donors and the dichloromethane, chloroform, carbon tetrachloride and n-hexane have been used as solvents. Acoustical parameters such as adiabatic compressibility (β), absorption coefficient (α/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. The formation constants with polarizability, dielectric strength and dipole moment of the donor and solvent molecules have been correlated. 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.
Page(s): 903-908
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.44(12) [December 2006]

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