Origin of the solvent effect on the photolysis of pentaamminebromocobalt(2+) at 254 nm in a water-acetonitrile solvent system

1990 ◽  
Vol 29 (7) ◽  
pp. 1450-1451 ◽  
Author(s):  
Cooper H. Langford ◽  
Elspeth Lindsay
Keyword(s):  
Solvent Effect ◽  
Solvent System

Kinetic medium effects. III. Solvent effects on A1 and A2 Hydrolyses in water-dimethyl sulphoxide mixtures

1967 ◽  
Vol 20 (9) ◽  
pp. 1815 ◽  
Author(s):  
BG Cox ◽  
PT McTigue
Keyword(s):  
Ethyl Acetate ◽  
Solvent Effect ◽  
Activity Coefficients ◽  
Solvent Effects ◽  
Butyl Acetate ◽  
Solvent System ◽  
Solvent Composition ◽  
Dimethyl Sulphoxide ◽  
Medium Effects ◽  
System Activity

The relative rates of the concurrent A1 and A2 hydrolyses of t-butyl acetate have been measured as a function of solvent composition in water-dimethyl sulphoxide (DMSO) mixtures. A large difference in solvent effect is observed, which correlates well with observed solvent effects on ethyl acetate (A2) and acetal (Al) hydrolyses in the same solvent system. Activity coefficients have been measured for t-butyl acetate, ethyl acetate, and acetal in various water-DMSO mixtures.

ChemInform Abstract: Origin of the Solvent Effect on the Photolysis of Co(NH3)5Br2+ at 254 nm in a Water-Acetonitrile Solvent System.

ChemInform ◽  
1990 ◽  
Vol 21 (29) ◽  
Author(s):  
C. H. LANGFORD ◽  
E. LINDSAY
Keyword(s):  
Solvent Effect ◽  
Solvent System

scholarly journals Mechanism of the Solvent Effect in a Binary Solvent System on the Cationic Polymerization ofN-Phenylethylenimine

1969 ◽  
Vol 42 (12) ◽  
pp. 3514-3518 ◽  
Author(s):  
Tsutomu Kagiya ◽  
Tomizo Kondo
Keyword(s):  
Solvent Effect ◽  
Cationic Polymerization ◽  
Solvent System ◽  
Binary Solvent

Spectrophotometric study of the dissociation of p-nitroanilinium ion in a binary aqueous-dipolar aprotic solvent system (H2O + acetonitrile) at 25 °C: effect of the solvent

1984 ◽  
Vol 62 (9) ◽  
pp. 1776-1779
Author(s):  
A. L. De ◽  
T. K. De
Keyword(s):  
Solvent Effect ◽  
Dissociation Constants ◽  
Spectrophotometric Study ◽  
Solvent System ◽  
Individual Species ◽  
Aqueous Mixtures ◽  
Gibbs Energies ◽  
Gibbs Energies Of Transfer ◽  
Aqueous Mixture ◽  
The Individual

Thermodynamic dissociation constants (SK) of p-nitroanilinium ion (BH+) have been determined at 25 °C in aqueous solutions containing 20, 40, 60, and 80 wt% acetonitrile (ACN) by spectrophotometric measurements. Standard Gibbs energies of transfer, [Formula: see text] (B) of p-nitroaniline (B) from water to other solvents have been evaluated from the measurement of solubilities at 25 °C. Solvent effect on the dissociation of the acid (BH+), δ(ΔG0) = 2.303RT[p(sK) − p(wK], results in a characteristic minimum with a change in the solvent composition. The result in this protic – dipolar aprotic mixture (H2O + ACN) has been compared with that in aqueous mixture of protic solvent (H2O + ethylene glycol) available from literature. The solvent effect has been discussed in terms of the standard Gibbs energies of transfer [Formula: see text], from water to aqueous mixtures of organic co-solvent of the uncharged base (B), the hydrochloride of the base (BHCl), and hydrochloric acid (HCl) and also in terms of the individual species involved in the dissociation process. The results indicate that solvent effect on dissociation is an involved process, guided by the combined effects of various types of solute–solvent interactions of the Brønsted acid and its conjugate base in addition to the relative solvent basicities.

scholarly journals Studies on the effect of Aquo-Dioxan Solvent System on the biochemical behaviour of the Substituted Valerates

2020 ◽  
Vol 16 (5) ◽  
pp. 63-71
Author(s):  
SUSHMA KUMARI ◽  
Keyword(s):  
Free Energy ◽  
Solvent Effect ◽  
Hydrolysis Product ◽  
Solvent System ◽  
Simultaneous Increase ◽  
Solute Interaction ◽  
Reaction Media ◽  
Energy Activation

Valerates and Substituted Valerates have been found to be useful for humanbeings as its hydrolysis product i.e. valence acid is used in the society in the form of perfumes flavours platister, vinyl stabilizer and pharmaceuyicals. With a views to study the solvent effect of 1:4 dioxan on the biochemical behivour of the hydrolysis product of a substituted valerate, the kinetic of Alkali catalysed of mothyl iso-valerate was studies in aquodioxan media. Increase observed in free energy activation with simultaneous increase in the value of both the activation H* and S*, it is concluded that in the presence of dioxan with reaction media, the reaction becomes enthaipy dominating and entropy controlled. From the evaluated values of the reaction which comes to be 329.0, it is inferred that Barclay-Butler rule is obeyed by the reaction and there is strong solvent- solute interaction in presence of dioxan the reaction media.

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