Solvent effects on aromatic nucleophilic substitutions. Part 4. Kinetics of the reaction of 1-chloro-2,4-dinitrobenzene with piperidine in protic solvents

1986 ◽  
pp. 1427 ◽  
Author(s):  
Rub�n D. Martinez ◽  
Pedro M. E. Mancini ◽  
Leonor R. Vottero ◽  
Norma S. Nudelman
Keyword(s):  
Solvent Effects ◽  
Nucleophilic Substitutions ◽  
Protic Solvents ◽  
Kinetics Of

Solvent effects on the decarboxylation of trichloroacetic acid: insights from ab initio molecular dynamics simulations

2018 ◽  
Vol 20 (34) ◽  
pp. 21988-21998 ◽  
Author(s):  
Guilherme C. Q. da Silva ◽  
Thiago M. Cardozo ◽  
Giovanni W. Amarante ◽  
Charlles R. A. Abreu ◽  
Bruno A. C. Horta
Keyword(s):  
Molecular Dynamics ◽  
Ab Initio ◽  
Molecular Dynamics Simulations ◽  
Solvent Effects ◽  
Trichloroacetic Acid ◽  
Ab Initio Molecular Dynamics ◽  
Aprotic Solvents ◽  
Protic Solvents ◽  
Dynamics Simulations ◽  
Kinetics Of

The kinetics of trichloroacetic acid (TCA) decarboxylation strongly depends on the solvent in which it occurs, proceeding faster in polar aprotic solvents compared to protic solvents.

Evidence for general base catalysis by protic solvents in a kinetic study of alcoholyses and hydrolyses of 1-(phenoxycarbonyl)pyridinium ions under both solvolytic and non-solvolytic conditions

2009 ◽  
Vol 74 (1) ◽  
pp. 43-55 ◽  
Author(s):  
Dennis N. Kevill ◽  
Byoung-Chun Park ◽  
Jin Burm Kyong
Keyword(s):  
Second Order ◽  
Base Catalysis ◽  
Substitution Reactions ◽  
Third Order ◽  
Methoxy Derivative ◽  
First Order ◽  
General Base ◽  
Protic Solvents ◽  
Kinetics Of ◽  
Pyridinium Ions

The kinetics of nucleophilic substitution reactions of 1-(phenoxycarbonyl)pyridinium ions, prepared with the essentially non-nucleophilic/non-basic fluoroborate as the counterion, have been studied using up to 1.60 M methanol in acetonitrile as solvent and under solvolytic conditions in 2,2,2-trifluoroethan-1-ol (TFE) and its mixtures with water. Under the non- solvolytic conditions, the parent and three pyridine-ring-substituted derivatives were studied. Both second-order (first-order in methanol) and third-order (second-order in methanol) kinetic contributions were observed. In the solvolysis studies, since solvent ionizing power values were almost constant over the range of aqueous TFE studied, a Grunwald–Winstein equation treatment of the specific rates of solvolysis for the parent and the 4-methoxy derivative could be carried out in terms of variations in solvent nucleophilicity, and an appreciable sensitivity to changes in solvent nucleophilicity was found.

THE ALKALINE CLEAVAGE OF o-NITROBENZYLTRIMETHYLSILANE SOLVENT EFFECTS IN THE DIOXANE–WATER SYSTEM

1963 ◽  
Vol 41 (6) ◽  
pp. 1525-1530 ◽  
Author(s):  
H. R. Allcock
Keyword(s):  
Transition State ◽  
Solvent Effects ◽  
Water System ◽  
Solvent Polarity ◽  
High Water ◽  
Aqueous Dioxane ◽  
Alkaline Cleavage ◽  
Rate Of Reaction ◽  
Kinetics Of

The kinetics of alkaline cleavage of o-nitrobenzyltrimethylsilane were examined in aqueous dioxane media. At high water concentrations, increases in solvent polarity retard the cleavage, as required by a mechanism involving charge dispersion in the transition state. At high dioxane concentrations, solvent polarity increases are accompanied by increases in the rate of reaction, a result which may reflect association between the solvent components.

Kinetics of lipase-catalyzed esterification in organic media: Correct model and solvent effects on parameters

1999 ◽  
Vol 24 (8-9) ◽  
pp. 463-470 ◽  
Author(s):  
Anja E.M. Janssen ◽  
Birte J. Sjursnes ◽  
Alexander V. Vakurov ◽  
Peter J. Halling
Keyword(s):  
Solvent Effects ◽  
Organic Media ◽  
Correct Model ◽  
Kinetics Of

The solvent effects on the kinetics of bacterial formate dehydrogenase reaction

1990 ◽  
Vol 1039 (3) ◽  
pp. 290-296 ◽  
Author(s):  
Alexander P. Demchenko ◽  
Oksana I. Rusyn ◽  
Alexey M. Egorov ◽  
Vladimir I. Tishkov
Keyword(s):  
Solvent Effects ◽  
Formate Dehydrogenase ◽  
Dehydrogenase Reaction ◽  
Kinetics Of
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