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Title: Solvation behaviour of Cu+ and Ag+ ions in acetonitrile-rich mixtures of benzene and ethanol. A viscometlic study
Authors: Chauhan, M S
Sharma, K
Kumar, G
Issue Date: Oct-2003
Publisher: NISCAIR-CSIR, India
Abstract: Viscocities of BU4NClO4, BU4NNO3, AgNO3 and CuClO4 have been determined in acetonitrile-rich mixtures of benzene and ethanol at 25°C. The data have been analyzed in terms of Jones Dole viscosity A and B-coefficient s. Ionic contributions B± values have been obtained on the basis of BU4NBPh4 assumption. Effective ionic radii (Ri) of ClO4‾, NO3‾, Cu+ and Ag+ have been calculated from the relation: B± = 2.5 (4/3)π Ri3 N/3000. An examination of Ri values as a function of solvent composition suggests the existence of specific ion-solvent interactions in the case of Cu+ and Ag+ ions. A contribution due to hydrogen bond formation is however observed in acetonitrile-ethanol mixture in case of ClO4‾  and NO3‾ anions. A reasonably good agreement in respect of Ri values of all ions with those obtained earlier from conductance measurements is attributed to the fact that the solvated ionic species exist as rigid spherical entities during the viscous flow process.
Page(s): 2506-2508
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.42A(10) [October 2003]

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