Ion-solvent interactions. VII. Apparent and partial molal volumes of some symmetrical tetraalkylammonium halides in anhydrous methanol solutions

The partial molal volumes of Na+, Ag+, Cu+, Ph4As+, BPh4-, Cl- and NO3- are reported for transfer from water to various acetonitrile/water (MeCN/H2O) mixtures by using the tatb assumption that ΔVt(Ph4As+) = ΔVt(BPh4-). The results, which show a complex dependence of ionic partial molal volumes on MeCN/H2O solvent composition, are discussed in terms of ion-solvent and solvent-solvent interactions. This study complements earlier work on the energetics of transfer (tatb assumption) of these ions from water to aqueous acetonitrile solutions.

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Partial molal volumes of tetraalkylammonium halides and assignment of individual ionic contributions

Transactions of the Faraday Society ◽

10.1039/tf9666202738 ◽

1966 ◽

Vol 62 ◽

pp. 2738 ◽

Cited By ~ 179

Author(s):

B. E. Conway ◽

R. E. Verrall ◽

J. E. Desnoyers

Keyword(s):

Partial Molal Volumes ◽

Molal Volumes ◽

Tetraalkylammonium Halides

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ON ION-SOLVENT INTERACTIONS. PART I. PARTIAL MOLAL VOLUMES OF IONS IN AQUEOUS SOLUTION1,2

The Journal of Physical Chemistry ◽

10.1021/j100823a009 ◽

1961 ◽

Vol 65 (5) ◽

pp. 740-744 ◽

Cited By ~ 96

Author(s):

Pasupati Mukerjee

Keyword(s):

Solvent Interactions ◽

Partial Molal Volumes ◽

Molal Volumes

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Solvation of ions. XXV. Partial molal volumes of single ions in protic and dipolar aprotic solvents

Australian Journal of Chemistry ◽

10.1071/ch9750955 ◽

1975 ◽

Vol 28 (5) ◽

pp. 955 ◽

Cited By ~ 74

Author(s):

MRJ Dack ◽

KJ Bird ◽

AJ Parker

Keyword(s):

Propylene Carbonate ◽

Dimethyl Sulphoxide ◽

Aprotic Solvents ◽

Solvent Interactions ◽

Partial Molal Volumes ◽

Steric Crowding ◽

Solvation Of Ions ◽

Molal Volumes ◽

Solvent Molecules ◽

Dipolar Aprotic Solvents

Partial molal volumes at 25� are reported for some 1 : 1 electrolytes, and for triphenylmethane, in dimethyl sulphoxide, N,N- dimethylformamide, acetonitrile, propylene carbonate, formamide and hexamethylphosphoramide. The assumption that ΔV�tr(Ph4As+) = ΔV�tr(BPh4-) was used to obtain ionic partial molal volumes of transfer from water to the non-aqueous solvents. Solvent compressibility appears to determine the partial molal volumes of non-electrolytes and large hydrophobic ions in solution. Values of ΔV�tr for cations and anions are discussed in terms of ion-solvent interactions, solvent-solvent interactions and steric crowding of large solvent molecules around the ions.

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A Comparative Study of Bu4NBr, NaBPh4, Ph4PCl, and Ph4AsCl in Water and Methanol at 25 °C: Partial Molal Volumes, Heat Capacities, and Viscosities

Canadian Journal of Chemistry ◽

10.1139/v72-506 ◽

1972 ◽

Vol 50 (19) ◽

pp. 3167-3178 ◽

Cited By ~ 56

Author(s):

C. Jolicoeur ◽

P. R. Philip ◽

G. Perron ◽

P. A. Leduc ◽

J. E. Desnoyers

Keyword(s):

Comparative Study ◽

Transfer Functions ◽

Heat Capacities ◽

Solvent Interactions ◽

Apparent Molal Volumes ◽

Partial Molal Volumes ◽

Molal Volumes

The apparent molal volumes [Formula: see text] and heat capacities [Formula: see text] of Bu4NBr, NaBPh4, Ph4PCl, and Ph4AsCl have been measured in water and methanol at 25 °C in the concentration range 0.01–0.2 M. The viscosity of aqueous NaBPh4 and Ph4AsCl have also been measured at 25 °C and in the same concentration range. Individual ionic values have been estimated for most of these properties. A comparison of these values for the quaternary ions BU4N+, [Formula: see text], Ph4P+, Ph4As+ illustrates sizable differences in the solute–solvent interactions of alkyl and aryl substituted ions. Some specificity is also suggested in the solvation of the tetraphenyl ions, as shown by a comparison of the properties which should reflect directly the size of the ions [Formula: see text]and also in (H2O → CH3OH) transfer functions.

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