Preferential solvation of ions in mixed solvents—III. Conductance studies of some 1:1 electrolytes in N,N-dimethylformamide + methanol mixtures at 25°C.

✍ Scribed by D.S. Gill; A. Sharma; M.S. Chauhan; A.N. Sharma; J.S. Cheema

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 306 KB
• Volume: 30
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(85)80075-x

✦ Synopsis

Equivalent conducfances of Bu4NN03, AgNO. and Kl in methanol (MeOH) and those of Bu4NBPh4, Bu+NNOs, ByNI, AgNOs and KI in several N,N-dimethylformamide+methanol (DMF + MeOH) mixtures over the entire solvent composition range have been measured at 25°C. The conductance data in ail the case-s have been analyscd by the Shedlovsky method. Evaluation of limiting ion conductances (AD) and hence the solvated radii (ri) of ions in DMF + MeOH mixtures shows a homoselective preferential salvation of Bu,NBPb. Bu.+NNO, and Bu4NI with the cation Bu,N+ and the anions Ph4B-, NO; and Iall being selectively solvated by MeOH. AgNOJ and KI, on the other hand, are heteroselectively preferentially solvated with Ag+ and Kf being preferentially solvated by DMF and NO; and Ipreferentially solvated by MeOH.