Selective hydration of alkylammonium ions in nitrobenzene

  title={Selective hydration of alkylammonium ions in nitrobenzene},
  author={Akiko Ogata and Yoshio Tsujino and Toshiyuki Osakai},
  journal={Physical Chemistry Chemical Physics},
In the nitrobenzene (NB)/water system, primary to tertiary ammonium ions with Me, Et and n-Bu groups were distributed with dipicrylaminate (DPA−) and tetraphenylborate (TPB−), and the number of water molecules being co-extracted to NB by an alkylammonium ion (RmNH4−m+) was measured by the Karl Fischer method. In the use of TPB− as the counter ion, the numbers of co-extracted water molecules, mainly for primary and secondary alkylammonium ions, were somewhat smaller than those in the use… Expand
6 Citations
Coextraction of water into nitrobenzene with organic ions.
It was found that the n values showed a clear dependence on the average value of Ei on oxygen or hydrogen atoms, respectively, of an anionic or cationic group, depending on not only the charged groups but also the noncharged R-groups. Expand
Temperature effect on the selective hydration of sodium ion in nitrobenzene.
It has been shown that water solubility into NB substantially increases with temperature, and the latter effect overwhelms the former unfavorable entropy effect, which results in a net increase of the n-value. Expand
Selective Hydration of a Carboxylate Group in Nitrobenzene
Eight different carboxylate ions were extracted with Crystal Violet into nitrobenzene. The Karl Fischer method was employed to determine the numbers of water molecules co-extracted with theExpand
Prediction of the Standard Gibbs Energy of Transfer of Organic Ions Across the Interface between Two Immiscible Liquids.
This non-Bornian model is promising for theoretical prediction of ΔGtr°,W→O (or ΔOWϕ°) for organic ions and possibly of the biomembrane permeability for ionic drugs. Expand
Asphaltene Self-Association and Precipitation in Solvents—AC Conductivity Measurements
Techniques used for investigating asphaltene self-association are reviewed. The principles, fundamental differences, and limits of each technique are briefly discussed. A new approach using ACExpand


Hydration of Ions in Organic Solvent and Its Significance in the Gibbs Energy of Ion Transfer between Two Immiscible Liquids
Various kinds of cations (alkali and alkaline earth metal ions, Me4N+, Et4N+, n-Bu4N+, and tetraphenylarsonium ion) and anions (halide ions, SCN-, ClO4-, NO3-, and tetraphenylborate ion) have beenExpand
Solvent Extraction of Several Anions with Tetrabutylammonium Ion into 1,2-Dichloroethane and Hydration of Anions in the Organic Phase
The partition equilibrium of tetrabutylammonium salts Bu4NX, where X− is N3−, NO3−, SCN−, ClO4−, and picrate ion, has been measured between water and 1,2-dichloroethane at 298 K. The distributionExpand
Studies of the Interaction between the Hexyl Anion and Alkali Metal Ions
The Hexyl(2,4,6,2′,4′,6′-hexanitrodiphenylamine) anion forms ion-pairs with alkali metal cations to some extent in an aqueous solution. The association constants of these ion-pairs were determinedExpand
ABSTRACT Extraction of M(ClO4)m, (Mm+ = Li+, Na+, Mg2+, and Ca2+) from their aqueous solutions into hexane with trioctytphosphine oxide (TOPO) and the co-extraction of water have been measured at 298Expand
The Coextraction of Water into Nitrobenzene with Alkali and Alkaline Earth Metal Salts of 2,2′,4,4′,6,6′-Hexanitrodiphenylamine in the Presence of Several Crown Ethers and Cryptands
Alkali and alkaline earth metal salts of 2,2′,4,4′,6,6′-hexanitrodiphenylamine (HND) were extracted into nitrobenzene in the absence or presence of several crown ethers or cryptands which differ fromExpand
The distribution of alkali metal, ammonium, and tetraethylammonium dipicrylaminates between water and nitrobenzene phases
Abstract The extraction of univalent metal dipicrylaminates into nitrobenzene was investigated colorimetrically at pH = 10 keeping the ionic strength of the aqueous phase constant by means of theExpand
Transference of Water to the Nitrobenzene Phase for the Extraction of Tris(1,10-phenanthroline)iron (II) and Tris(2,2′-bipyridine)iron(II) Chelate Salts
The amount of water transferred to the nitrobenzene phase was determined for the extraction of ion pairs of tris(1,10-phenanthroline)iron(II) and tris(2,2′-bipyridine) iron(II) with halide andExpand
Solvent extraction of trialkylammonium salts
Abstract Partition constants have been determined for a series of trialkylammonium chlorides, bromides, iodides and perchlorates between water and nitrobenzene. Extraction of these salts intoExpand
Non-Bornian Theory of the Gibbs Energy of Ion Transfer between Two Immiscible Liquids
A non-Bornian theory has been proposed for the standard Gibbs free energy of ion transfer at the organic solvent (O)/water (W) interface. In this theory the ionic charge (z)-dependent term of , whichExpand
Electrolysis with electrolyte dropping electrode: II. Basic properties of the system
Abstract In a theoretical discussion the conditions have been pointed out where an interface of two immiscible electrolyte solution behaves as an equilibrium system metal ion-metallic electrode, asExpand