The use of conductivity measurements in organic solvents for the characterisation of coordination compounds

Cyclic voltammetry experiments at minielectrodes exhibit less ohmic error for lower polarity solvents when the supporting electrolyte anion is [B(C6F5)4]- rather than one of the smaller traditional anions such as [BF4]-, [PF6]-, or [ClO4]-. Conductance measurements have been performed for [NBu4][B(C6F5)4] in tetrahydrofuran, dichloromethane, benzotrifluoride, and acetonitrile and compared with results for [NBu4]+ salts of several traditional anions in the same solvents. In solvents with dielectric constants of 10 or less, ion association constants, KA, are as much as 2 orders of magnitude lower with [B(C6F5)4]-, TFAB, as the electrolyte anion and the degree of this lowering is related to the acceptor property of the solvent. Analyses carried out on the basis of a Fuoss model attribute this fact to differences in concentrations of contact ion pairs rather than of solvent-separated ion pairs. The greater dissociation of the TFAB ion is attributed to its highly delocalized charge.

Comparison of the conductivity properties of the tetrabutylammonium salt of tetrakis(pentafluorophenyl)borate anion with those of traditional supporting electrolyte anions in nonaqueous solvents.

Multinuclear NMR spectroscopy and conductivity measurements showed that the 1-ethyl-3-methyl-imidazolium cation, [emim]+, not only forms strong hydrogen bonds (using all three ring protons H2, H4 and H5) with halide ions in polar molecular solvents (e.g. ethanenitrile) and ionic liquids, but that it exists in a quasi-molecular state, [emim]X, in non-polar solvents (e.g. trichloro- and dichloro-methane), showing a conventional aromatic stacking phenomenon.

Evidence for hydrogen bonding in solutions of 1-ethyl-3-methylimidazolium halides, and its implications for room-temperature halogenoaluminate(III) ionic liquids

An interpretation for the distance parameter of the Fuoss-Onsager conductance equation in the case of ionic association☆

(1970). Estimation of Medium Effects for Single Ions in Non-Aqueous Solvents. C R C Critical Reviews in Analytical Chemistry: Vol. 1, No. 1, pp. 73-117.

Estimation of Medium Effects for Single Ions in Non-Aqueous Solvents

Evaluation of Single Ion Conductivities in Acetonitrile, Nitromethane, and Nitrobenzene Using Tetraisoamylammonium Tetraisoamylboride as Reference Electrolyte

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Evaluation of Single Ion Conductivities in Acetonitrile, Nitromethane, and Nitrobenzene Using Tetraisoamylammonium Tetraisoamylboride as Reference Electrolyte