Heats of Solution of Some Tetraalkylammonium Salts in Water and in Propylene Carbonate and Ionic Enthalpies of Transfer from Water to Propylene Carbonate

1966 ◽  
Vol 70 (6) ◽  
pp. 2020-2024 ◽  
Author(s):  
Yung-Chi Wu ◽  
Harold L. Friedman
Keyword(s):  
Propylene Carbonate ◽  
Tetraalkylammonium Salts ◽  
Enthalpies Of Transfer ◽  
Heats Of Solution

Protonation of purines and related compounds in dimethylsulfoxide and water

1985 ◽  
Vol 63 (6) ◽  
pp. 1228-1232 ◽  
Author(s):  
Robert L. Benoit ◽  
Danielle Boulet ◽  
Luc Séguin ◽  
Monique Fréchette
Keyword(s):  
Solvent Effect ◽  
Functional Groups ◽  
Thermodynamic Data ◽  
Ionization Constants ◽  
Enthalpies Of Transfer ◽  
Heats Of Solution ◽  
Bonding Properties ◽  
Related Compounds

The ionization constants of the conjugated acids BH+ of purine, adenine, 9-methyladenine, adenosine, guanine, and hypoxanthine, and of the related compounds imidazole, N-methylimidazole, benzimidazole, and 4-amino-2,6-dimethylpyrimidine have been determined potentiometrically in Me2SO. The heats of solution and the heats of protonation of most of these bases have been obtained by calorimetry. Some additional determinations were carried out in water so that thermodynamic data in Me2SO and in water could be compared. Our discussion of the solvent effect on these data is largely based on a consideration of the enthalpies of transfer of B and BH+ and emphasizes the contrasting H-bonding properties of the solvents and of the functional groups on the solutes B and BH+.

Conductance of tetraalkylammonium salts in propylene carbonate at 25�C

1978 ◽  
Vol 7 (8) ◽  
pp. 631-638 ◽  
Author(s):  
Zenon Pawlak ◽  
R. A. Robinson ◽  
Roger G. Bates
Keyword(s):  
Propylene Carbonate ◽  
Tetraalkylammonium Salts

Heats of solution of electrolytes in ethanol and derived enthalpies of transfer from water

1978 ◽  
Vol 74 (0) ◽  
pp. 359 ◽  
Author(s):  
Michael H. Abraham ◽  
Eric Ah-Sing ◽  
Angela F. Danil de Namor ◽  
Tony Hill ◽  
Asadollah Nasehzadeh ◽  
...  
Keyword(s):  
Enthalpies Of Transfer ◽  
Heats Of Solution

Heats of solution of 1?1 electrolytes in 1-propanol, and derived enthalpies of transfer from water

1977 ◽  
Vol 6 (8) ◽  
pp. 491-500 ◽  
Author(s):  
Michael H. Abraham ◽  
Angela F. Danil de Namor ◽  
Ronald A. Schulz
Keyword(s):  
Enthalpies Of Transfer ◽  
Heats Of Solution

Enthalpies of transfer of alkane solutes from the vapor state to organic solvents

1985 ◽  
Vol 63 (2) ◽  
pp. 349-352 ◽  
Author(s):  
Richard Fuchs ◽  
W. Kirk Stephenson
Keyword(s):  
Organic Solvents ◽  
Solubility Parameter ◽  
Empirical Correlation ◽  
Enthalpies Of Transfer ◽  
Vapor State ◽  
Heats Of Solution ◽  
Hildebrand Solubility Parameter

Heats of solution of 5 – 8 C5–C16 alkane liquids have been determined in each of 19 organic solvents covering the Taft–Kamlert π* (dipolarity-polarizability) range −0.08 to 1.00. Enthalpies of alkane transfer from vapor to solvents have been calculated (ΔH(v → S) = ΔHs − ΔHv). The methylene increments in (ΔH(v → S) in the 19 solvents and water (−1.18 to −0.67 kcal/mol) are not well correlated with the Hildebrand solubility parameter δ, but an empirical correlation exists with solvent π* and polarizability:[Formula: see text](n = 20, r = 0.977, see = 0.032). By this criterion the small methylene increment in water appears to be associated with the high dipolarity and low polarizability of water.

Effects of salts on the kinetics of oxidation of alkenes by thallic salts in aqueous solutions

1981 ◽  
Vol 46 (3) ◽  
pp. 693-700 ◽  
Author(s):  
Milan Strašák ◽  
Jaroslav Majer
Keyword(s):  
Aqueous Solutions ◽  
Phase Transfer ◽  
Heterogeneous Reaction ◽  
Qualitative Model ◽  
Kinetic Effect ◽  
Tetraalkylammonium Salts ◽  
Reaction Conditions ◽  
Kinetics Of Oxidation ◽  
Kinetics Of ◽  
Heterogeneous Reaction Conditions

The kinetics of oxidation of alkenes by thallic sulphate in aqueous solutions, involving the two reaction steps-the hydroxythallation and the dethallation - was studied, and the effect of salts on the kinetics was examined; this made it possible to specify more precisely the reaction mechanism and to suggest a qualitative model of the reaction coordinate. It was found that in homogeneous as well as in heterogeneous reaction conditions, the reaction can be accelerated appreciably by adding tetraalkylammonium salts. These salts not only operate as catalysts of the phase transfer, but also exert a significant kinetic effect, which can be explained with a simplification in terms of a stabilization of the transition state of the reaction.

Heats of Solution of Some Sodium and Potassium Salts in Water and in Water-Methanol Mixtures

1992 ◽  
Vol 57 (11) ◽  
pp. 2227-2234 ◽  
Author(s):  
Ján Benko ◽  
Oľga Vollárová
Keyword(s):  
Transfer Functions ◽  
Enthalpies Of Solution ◽  
Potassium Salts ◽  
Solvent Interactions ◽  
Heats Of Solution ◽  
Solvent Molecules ◽  
Sodium And Potassium

The enthalpies of solution ∆Hs0 were determined for NaSCN, KSCN, NaBrO3, KBrO3, NaClO3, KClO3, NaIO4, KMnO4, KNO2 and NaNO2 in water-methanol mixtures. The transfer functions ∆Ht0 of the salts and anions were calculated based on the extrathermodynamic TPTB assumption. The ∆Ht0 values of the anion obtained from the sodium and potassium salts were compared. The differences observed, particularly at higher concentrations of the cosolvent, are discussed with respect to the interactions between the solvent molecules and the solute-solvent interactions.

Acyclic Acetals in Propylene Carbonate-Based Electrolytes for Advanced and Safer Graphite-Based Lithium Ion Batteries

2020 ◽  
Vol 167 (4) ◽  
pp. 040509 ◽  
Author(s):  
J. Atik ◽  
S. Röser ◽  
R. Wagner ◽  
D. Berghus ◽  
M. Winter ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Propylene Carbonate ◽  
Lithium Ion
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