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|Title:||Ultrasonic studies on charge transfer complexes of iodine with certain aromatic compounds in n-hexane solution|
|Abstract:||Ultrasonic velocities, densities and viscosities have been measured in n-hexane solutions containing iodine (acceptor) and diphenyl (DP), diphenyl amine (DPA) or diphenyl ether (OPE) (donor) at various equimolar concentrations at 303 K. Acoustical parameters such as adiabatic compressibility (β). linear free length (Lf), relaxation time (τ), free volume (Vf), molecular interaction parameter (χ), acoustical impedance (Z). absorption coefficient (α/f2), Rao's constant (R), cohesive energy (CE), internal pressure (πi) and Van der Waal's constant (a) are evaluated. These parameters indicate the formation of charge- transfer complexes between iodine and the aromatic compounds. The stability constant (K), the free energy of activation (ΔG*). the standard free energy of formation (ΔG° )values are reported for the donor-acceptor complexes. These investigations reveal that the stability of the charge transfer complex depends on the structure of the aromatic compound.|
|ISSN:||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.40(01) [January 2002]|
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