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Title: Conductance study of electrolyte solutions in binary mixtures of dimethylformamide and dimethylsulphoxide at different temperatures
Authors: Chauhan, M S
Kumar, G
Chauhan, S
Gupta, S
Issue Date: Apr-2004
Publisher: NISCAIR-CSIR, India
IPC Code: Int. Cl.7 G01N
Abstract: Limiting molar conductances (Ʌo) of Ph4PBPh4, Bu4NB Ph4, Bu4NNO3, Bu4NClO4, Bu4NBr, Bu4NI, Ph4PBr, NaBPh4, AgClO4, AgNO3, LiNO3, NaNO3, KNO3 and NaBr have been determined in DMF-DMSO mixtures at 25, 35 and 45°C using Shedlovsky conductance equation. Limiting molar ionic conductances (λoi) have been calculated from λo(Ph4P+)  λo(Ph4Bˉ ) assumption. Discussion of effective ionic radii (ri) calculated from λoi values is based on ion-solvent interactions. The results indicate the existence of electrostatic ion-solvent interactions in the case of alkali metal cations via O atom of both the solvents and specific interactions between Ag+ ion and DMSO via S atom of S=O group of DMSO molecule. The latter is found to be in agreement with the concept of soft acid-base type of interactions. Association constants (KA), however, yield no significant contribution.
Page(s): 734-738
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.43A(04) [April 2004]

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