Effect of formaldehyde on the rate constants for the reactions of isoprene, dimethylvinylcarbinol, and dimethylallyl alcohol in aqueous perchloric and sulfuric acid solutions

1978 ◽  
Vol 27 (8) ◽  
pp. 1552-1560
Author(s):  
M. I. Vinnik ◽  
G. F. Osipova ◽  
R. S. Ryabova ◽  
V. S. Malinskii ◽  
A. P. Troitskii
Keyword(s):  
Sulfuric Acid ◽  
Rate Constants ◽  
Acid Solutions ◽  
Sulfuric Acid Solutions

Substituent Effects on the Hydrolysis of p-Substituted Benzonitriles in Sulfuric Acid Solutions at (25.0± 0.1) °C

2008 ◽  
Vol 63 (9) ◽  
pp. 603-608 ◽  
Author(s):  
Khamis A. Abbas
Keyword(s):  
Sulfuric Acid ◽  
Rate Constants ◽  
Inductive Effect ◽  
Substituent Effects ◽  
Acid Solutions ◽  
Rate Determining Step ◽  
Inductive Effects ◽  
High Concentrations ◽  
Sulfuric Acid Solutions ◽  
Hydrolysis Of

The rate constants of the hydrolysis of p-substituted benzonitriles with sulfuric acid solutions (18.2 M to 10 M) have been determined spectrophotometrically at (25.1±0.1) °C. It was found that the catalytic activity of sulfuric acid was strongly inhibited by water. The logarithms of the observed rate constants were correlated with different substituent inductive (localized) and resonance (delocalized) constants. The results of the correlation studies indicated that the rate-determining step of the hydrolysis of benzonitriles in 18.2 M sulfuric acid was the addition of a nucleophile, and the hydrolysis was clearly enhanced by the electron-withdrawing inductive effect, while the rate-determining step of the hydrolysis of p-substituted benzonitriles in 10.0 M sulfuric acid was most probably the protonation of benzonitriles, and the rate constants increased by both electron-donating resonance and inductive effects. A mixture of the two mechanisms most probably occurred in 15.3 to 17.0 M sulfuric acid. HSO4 − rather thanwater most probably acted as nucleophile in the hydrolysis of benzonitriles especially at high concentrations of sulfuric acid solutions.

scholarly journals The temperature dependence of the disproportionation reaction of iodous acid in aqueous sulfuric acid solutions

2002 ◽  
Vol 67 (5) ◽  
pp. 347-351 ◽  
Author(s):  
Smiljana Markovic ◽  
Novica Rakicevic ◽  
Djuro Misljenovic
Keyword(s):  
Sulfuric Acid ◽  
Temperature Dependence ◽  
Rate Constants ◽  
Graphical Method ◽  
Disproportionation Reaction ◽  
Specific Rate ◽  
Acid Solutions ◽  
Average Value ◽  
Sulfuric Acid Solutions ◽  
Ion Species

The aim of this work was to examine the disproportionation reaction of iodous acid, HOIO, in aqueous 0.18 mol/dm3H2SO4 solution, by spectrophotometric measurements of the absorbance. The absorbing HgI+-ion species were generated during the observed disproportionation process. The specific rate constants of disproportionation were calculated in the temperature range from 12 to 30 ?C. The average values ranged from 1.20 to 2.94 mol-1dm3 s-1, respectively. In addition, the values of the activation energies were determined by a graphical method. An average value of 71.20 kJ/mol was found for the chosen temperature interval.

Protection features of chromium-nickel steel in sulfuric acid solutions by triazole derivative

2019 ◽  
pp. 15-21
Author(s):  
Ya.G. Avdeev ◽  
◽  
Yu.B. Makarychev ◽  
D.S. Kuznetsov ◽  
L.P. Kazanskii ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Nickel Steel ◽  
Acid Solutions ◽  
Triazole Derivative ◽  
Sulfuric Acid Solutions

Electrochemistry of Gold in Aqueous Sulfuric Acid Solutions under Neural Stimulation Conditions

2005 ◽  
Vol 152 (7) ◽  
pp. E212 ◽  
Author(s):  
Daniel R. Merrill ◽  
Ionel C. Stefan ◽  
Daniel A. Scherson ◽  
J. Thomas Mortimer
Keyword(s):  
Sulfuric Acid ◽  
Neural Stimulation ◽  
Acid Solutions ◽  
Aqueous Sulfuric Acid ◽  
Sulfuric Acid Solutions
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