Determination of relative rate constants of hydrolysis of poly[(dimethylamino)ethyl methacrylate]

1983 ◽  
Vol 16 (6) ◽  
pp. 1009-1010 ◽  
Author(s):  
Yves Merle ◽  
Liliane Merle-Aubry
Keyword(s):  
Rate Constants ◽  
Relative Rate ◽  
Ethyl Methacrylate ◽  
Relative Rate Constants ◽  
Hydrolysis Of

The role of relative rate constants in determining surface state phenomena at semiconductor–liquid interfaces

2016 ◽  
Vol 18 (42) ◽  
pp. 29466-29477 ◽  
Author(s):  
Asif Iqbal ◽  
Md. Sazzad Hossain ◽  
Kirk H. Bevan
Keyword(s):  
Surface State ◽  
Rate Constants ◽  
Relative Rate ◽  
Liquid Interfaces ◽  
Theoretical Determination ◽  
Relative Rate Constants

Theoretical determination of surface state occupation statistics in semiconductor–liquid junctions to capture the non-trivial trends generally observed in the experiments.

scholarly journals Determination of relative rate constants for in vitro RNA processing reactions by internal competition

2014 ◽  
Vol 467 ◽  
pp. 54-61 ◽  
Author(s):  
Hsuan-Chun Lin ◽  
Lindsay E. Yandek ◽  
Ino Gjermeni ◽  
Michael E. Harris
Keyword(s):  
Rna Processing ◽  
Rate Constants ◽  
Relative Rate ◽  
Internal Competition ◽  
Relative Rate Constants

Kinetics of acid-catalyzed hydrolysis of fluorinated propanoates

1983 ◽  
Vol 48 (10) ◽  
pp. 2805-2811 ◽  
Author(s):  
Oldřich Paleta ◽  
Jaroslav Kvíčala ◽  
Václav Dědek
Keyword(s):  
Rate Constants ◽  
Relative Rate ◽  
Chloride Concentration ◽  
Activation Entropy ◽  
High Activation ◽  
Isokinetic Relationship ◽  
Relative Rate Constants ◽  
Acid Catalyzed ◽  
Kinetics Of ◽  
Hydrolysis Of

Rates of hydrolysis, kH+, of methyl 2-chloro-2,3,3,3-tetrafluoro-(III), 2,3-dichloro-2,3,3-trifluoro-(IV), 2,2,3-trichloro-3,3-difluoro-(V), 2,3,3,3-tetrafluoro-(VI) and 3-chloro-2,3,3-trifluoropropanoate (VII) were measured in 0.5M-HCl in aqueous methanol (80% vol; 76% wt) at 40, 50 and 60 °C. The relative rate constants, krel (50 °C), (for the propanoate III, kH+ = 4.3 . 10-5 l mol-1 s-1; krel = 100) are 311, 100, 38, 9.4, 44 and 15 for the esters II, III, IV, V, VI and VII, respectively (experimental error ±9%). It was found that krel = αβ where α and β are the following factors for groups in the position 2 and 3: CClF 10, CHF 4.2, CCl2 2.8, CF3 10 and CClF2 3.6. The rate constants obey the isokinetic relationship. For the ester III the dependence of log kobs on logarithm of hydrogen chloride concentration is linear at concentrations 0.08-2.4 mol l-1 which, together with high activation entropy ΔS≠ for the esters III-VII (-167 to -217 J mol-1 K-1), shows that the hydrolysis proceeds by an AAC2 mechanism.

Sign in / Sign up

Export Citation Format

Share Document