Solvent Effects on the Kinetics of Organic Reactions Described as the Concerted Single Electron Shift and Bond Interchange

ChemInform ◽  
2005 ◽  
Vol 36 (35) ◽  
Author(s):  
Jan S. Jaworski
Keyword(s):  
Solvent Effects ◽  
Organic Reactions ◽  
Single Electron ◽  
Kinetics Of

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

Kinetic solvent effects in organic reactions

2018 ◽  
Vol 32 (3) ◽  
pp. e3904 ◽  
Author(s):  
Belinda L. Slakman ◽  
Richard H. West
Keyword(s):  
Solvent Effects ◽  
Organic Reactions

Reactivity of base catalysed hydrolysis of 2-pyridinylmethylene-8-quinolinyl-Schiff base iron(II) iodide complexes: solvent effects

2013 ◽  
Vol 67 (4) ◽  
Author(s):  
Ahmad Mohamad ◽  
Mohamed Adam
Keyword(s):  
Aqueous Solution ◽  
Schiff Base ◽  
Solvent Effects ◽  
Base Hydrolysis ◽  
Iodide Ions ◽  
Ligand Structure ◽  
Solvation Parameters ◽  
Kinetics Of ◽  
Hydrolysis Of ◽  
Direct Condensation

AbstractThree ligands of 2-pyridinylmethylene-8-quinolinyl (L1), methyl-2-pyridinylmethylene-8-quinolinyl (L2), and phenyl-2-pyridinylmethylene-8-quinolinyl (L3), Schiff bases were synthesised by direct condensation of 8-aminoquinoline with 2-pyridinecarboxaldehyde, 2-acetylpyridine, or 2-benzoylpyridine. They coordinated to Fe(II) ion in a 1: 2 mole ratio followed by treatment with iodide ions affording complexes with a general formula [Fe(L)2]I2·2H2O, (L = L1, L2, or L3). Spectrophotometric evaluation of the kinetics of base catalysed hydrolysis of these complex cations was carried out with an aqueous solution of NaOH in different ratios of water/methanol binary mixtures. Kinetics of the hydrolysis followed the rate law (k 2[OH−] + k 3[OH−]2)[complex]. Reactivity trends and their rate constants were compared and discussed in terms of ligand structure and solvation parameters. The methanol ratio affects the hydrolysis as a co-solvent which was analysed into initial and transition state components. The increase in the rate constant of the base hydrolysis of Fe(II) complexes, as the ratio of methanol increases, is predominantly caused by the strong effect of the organic co-solvent on the transition states.

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