Kinetics of Proton Transfer from Benzoylnitromethane and 1,2-Diphenyl-2-nitroethanone to Various Bases. Resonance, Inductive, Solvation, Steric, and Transition State Hydrogen-Bonding Effects on Intrinsic Rate Constants

1997 ◽  
Vol 62 (23) ◽  
pp. 8162-8170 ◽  
Author(s):  
Claude F. Bernasconi ◽  
Robert L. Montañez
Keyword(s):  
Hydrogen Bonding ◽  
Proton Transfer ◽  
Transition State ◽  
Rate Constants ◽  
Intrinsic Rate ◽  
Kinetics Of

Kinetics of Proton Transfer Reactions of Carbon Acids. II. Reaction of Di-(4-nitrophenyl)methane with Alkoxide Bases

1972 ◽  
Vol 50 (1) ◽  
pp. 24-30 ◽  
Author(s):  
A. Jarczewski ◽  
K. T. Leffek
Keyword(s):  
Proton Transfer ◽  
Transition State ◽  
Rate Constants ◽  
Activation Parameters ◽  
Transfer Reactions ◽  
Activation Process ◽  
Proton Transfers ◽  
Proton Transfer Reactions ◽  
Carbon Acids ◽  
Kinetics Of

The second-order rate constants have been measured over a range of temperatures for the proton-transter reactions from di-(4-nitrophenyl)methane to ethoxide, isopropoxide, and t-butoxide ions in solvents consisting of the corresponding alcohols containing 10% toluene by volume. The activation parameters ΔH≠ and ΔS≠ have been calculated and an interpretation of them is given in terms of solvation effects during the activation process. A comparison between the activation parameters for proton transfers and E2 olefin-forming β-elimination reactions is made and discussed with respect to transition state character of the latter reactions.

Kinetics of Proton Transfer from Cationic Carbon Acids in Water and Aqueous DMSO. Effect of Activating Groups and Solvent on Intrinsic Rate Constants

2005 ◽  
Vol 70 (19) ◽  
pp. 7721-7730 ◽  
Author(s):  
Claude F. Bernasconi ◽  
Douglas E. Fairchild ◽  
Robert L. Montañez ◽  
Perdram Aleshi ◽  
Huaiben Zheng ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Rate Constants ◽  
Intrinsic Rate ◽  
Aqueous Dmso ◽  
Carbon Acids ◽  
Kinetics Of
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