An Acidity Function for the Solvent System Consisting of 20 Vol.% Ethanol and 80 Vol.% Sulfuric Acid-Water Mixtures1

1959 ◽  
Vol 81 (13) ◽  
pp. 3274-3278 ◽  
Author(s):  
Si-Jung Yeh ◽  
H. H. Jaffé
Keyword(s):  
Sulfuric Acid ◽  
Solvent System ◽  
Acid Water ◽  
Acidity Function

An acidity function in ethanol – sulfuric acid based on the protonation of diphenylamines

1967 ◽  
Vol 45 (9) ◽  
pp. 903-910 ◽  
Author(s):  
Douglas Dolman ◽  
Ross Stewart
Keyword(s):  
Sulfuric Acid ◽  
Nitro Group ◽  
Strong Interaction ◽  
Acidic Solution ◽  
Sulfuric Acid Concentration ◽  
Substituent Effects ◽  
Solvent System ◽  
Acidity Function ◽  
Substituent Constants ◽  
Hammett Σ Constants

A Hammett H0 acidity function based on the protonation of 17 diphenylamines in 20 volume % ethanol – aqueous sulfuric acid has been established. The H0 value for the most acidic solution studied (11.2 M sulfuric acid) is −6.97. This acidity function differs from that based on the protonation of azobenzenes in the same solvent system; the latter diverges to more negative H0 values as the sulfuric acid concentration increases.The [Formula: see text] values for the protonation of the diphenylamines vary from +1.36 for 4-methoxy-diphenylamine to − 6.21 for 4,4′-dinitrodiphenylamine. A plot of [Formula: see text] versus the Hammett σ constants for five monosubstituted diphenylamines yields a ρ value of +3.36. The [Formula: see text] values for 4-methoxy-, 4-methyl-, 4-methylsulfonyl-, and 4-nitro-diphenylamine are all less (more negative) than expected from the Hammett substituent constants. The substituent effects on the basicities of aniline and diphenylamine are the same.The basicities of several nitro-substituted diphenylamines appear to vary regularly, and do not reflect the presence of a strong interaction between the nitro group and sulfuric acid.

Heteronuclear NMR studies of cobalamins. 7. Protonation of the corrin ring in sulfuric acid/water mixtures

1987 ◽  
Vol 26 (25) ◽  
pp. 4143-4145 ◽  
Author(s):  
Kenneth L. Brown ◽  
Sherri Peck
Keyword(s):  
Sulfuric Acid ◽  
Heteronuclear Nmr ◽  
Acid Water ◽  
Nmr Studies

scholarly journals Effect of ions on sulfuric acid-water binary particle formation: 1. Theory for kinetic- and nucleation-type particle formation and atmospheric implications

2016 ◽  
Vol 121 (4) ◽  
pp. 1736-1751 ◽  
Author(s):  
Joonas Merikanto ◽  
Jonathan Duplissy ◽  
Anni Määttänen ◽  
Henning Henschel ◽  
Neil M. Donahue ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Particle Formation ◽  
Acid Water ◽  
Type Particle

THE SULFURIC ACID SOLVENT SYSTEM: PART VII. SOLUTIONS OF SOME TIN(IV) AND LEAD(IV) COMPOUNDS

1966 ◽  
Vol 44 (10) ◽  
pp. 1197-1202 ◽  
Author(s):  
R. J. Gillespie ◽  
R. Kapoor ◽  
E. A. Robinson
Keyword(s):  
Sulfuric Acid ◽  
Sulfonic Acid ◽  
Solvent System ◽  
Lead Tetraacetate ◽  
Benzene Sulfonic Acid ◽  
Tin Compounds ◽  
Cationic Species ◽  
Stannic Acid ◽  
System Part

Solutions of tetramethyl tin trimethyl tin sulfate, di-n-butyl tin diacetate, tetraphenyl tin, and triphenyl tin hydroxide in. 100% sulfuric acid have been investigated by cryoscopic and conductimetric methods. Tetramethyl tin reacts with sulfuric acid with the evolution of methane and the formation of trimethyl tin hydrogensulfate. Trialkyl tin hydrogensulfates and dialkyl tin dihydrogensulfates behave as strong bases. It is probable that the cationic species formed are protonated hydrogensulfates rather than "stannonium" ions. Phenyl-substituted tin compounds are cleaved in sulfuric acid with the formation of benzene sulfonic acid and the complex hexa(hydrogensulfato) stannic acid, H2Sn(HSO4)6, and its anions. Lead tetraacetate gives yellow solutions containing hexa(hydrogensulfato) plumbic acid, H2PB(HSO4O6, and its anions.

scholarly journals Binary nucleation of sulfuric acid-water: Monte Carlo simulation

1998 ◽  
Vol 108 (16) ◽  
pp. 6829-6848 ◽  
Author(s):  
I. Kusaka ◽  
Z.-G. Wang ◽  
J. H. Seinfeld
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Sulfuric Acid ◽  
Acid Water ◽  
Binary Nucleation

scholarly journals Hydrates in supersaturated binary sulfuric acid‐water vapor

1974 ◽  
Vol 61 (2) ◽  
pp. 573-581 ◽  
Author(s):  
R. H. Heist ◽  
H. Reiss
Keyword(s):  
Water Vapor ◽  
Sulfuric Acid ◽  
Acid Water

Protonation Equilibria of Tertiary Anilines in Sulfuric Acid: Water as a Reactant

1983 ◽  
Vol 136 (136) ◽  
pp. 65-67
Author(s):  
Michael W. Lovell ◽  
Brian S. Vogt ◽  
Stephen G. Schulman
Keyword(s):  
Sulfuric Acid ◽  
Acid Water ◽  
Protonation Equilibria
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