Prediction of the kinetic stability of N ‐alkyl‐X‐pyridinium ions in dichloromethane

2021 ◽  
Author(s):  
Mirela Matić ◽  
Bernard Denegri
Keyword(s):  
Kinetic Stability ◽  
Pyridinium Ions

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.

Varying kinetic stability, icosahedral ordering, and mechanical properties of a model Zr-Cu-Al metallic glass by sputtering

2021 ◽  
Vol 5 (3) ◽  
Author(s):  
Sachin V. Muley ◽  
Chengrong Cao ◽  
Debaditya Chatterjee ◽  
Carter Francis ◽  
Felix P. Lu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Metallic Glass ◽  
Kinetic Stability

Improving the kinetic stability of a hyperthermostable β-mannanase by a rationally combined strategy

2021 ◽  
Vol 167 ◽  
pp. 405-414
Author(s):  
Zhemin Liu ◽  
Qingping Liang ◽  
Peng Wang ◽  
Qing Kong ◽  
Xiaodan Fu ◽  
...  
Keyword(s):  
Kinetic Stability ◽  
Combined Strategy

Kinetic stability and NBO analysis of the C20-nAln nanocages (n = 1–5) using DFT investigation

2021 ◽  
Vol 1233 ◽  
pp. 130079
Author(s):  
Akbar Hassanpour ◽  
Leila Youseftabar-Miri ◽  
Parvaneh Delir Kheirollahi Nezhad ◽  
Sheida Ahmadi ◽  
Saeideh Ebrahimiasl
Keyword(s):  
Nbo Analysis ◽  
Kinetic Stability

scholarly journals The influence of oxidation-reduction state on the kinetic stability of pig kidney general acyl-CoA dehydrogenase and other flavoproteins

1984 ◽  
Vol 224 (2) ◽  
pp. 577-580 ◽  
Author(s):  
M Madden ◽  
S M Lau ◽  
C Thorpe
Keyword(s):  
Reduction Potential ◽  
Binding Protein ◽  
Sodium Dithionite ◽  
Egg White ◽  
Kinetic Stability ◽  
Pig Kidney ◽  
Data Support ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Electron Transferring Flavoprotein

Pig kidney general acyl-CoA dehydrogenase is markedly stabilized against loss of flavin and activity in 7.3 M-urea or at 60 degrees C upon reduction with sodium dithionite or octanoyl-CoA. Electron transferring flavoprotein is similarly stabilized, whereas egg white riboflavin-binding protein loses flavin more readily on reduction. These and other data support the anticipated correlation between the kinetic stability of the holoproteins and the oxidation-reduction potential of their bound flavins.

scholarly journals Differential scanning fluorimetry based assessments of the thermal and kinetic stability of peptide–MHC complexes

2016 ◽  
Vol 432 ◽  
pp. 95-101 ◽  
Author(s):  
Lance M. Hellman ◽  
Liusong Yin ◽  
Yuan Wang ◽  
Sydney J. Blevins ◽  
Timothy P. Riley ◽  
...  
Keyword(s):  
Kinetic Stability ◽  
Differential Scanning Fluorimetry

Protection by Oximes of bis-Pyridinium Ions against Lethal Diisopropyl Phosphonofluoridate Poisoning

Nature ◽  
1958 ◽  
Vol 182 (4650) ◽  
pp. 1672-1673 ◽  
Author(s):  
F. HOBBIGER ◽  
P. W. SADLER
Keyword(s):  
Pyridinium Ions
Sign in / Sign up

Export Citation Format

Share Document