Solvent Effects on pKavalues of Some Substituted Sulfonamides in Acetonitrile−Water Binary Mixtures by the UV-Spectroscopy Method

2009 ◽  
Vol 54 (11) ◽  
pp. 3014-3021 ◽  
Author(s):  
Senem Şanli ◽  
Yüksel Altun ◽  
Nurullah Şanli ◽  
Güleren Alsancak ◽  
Jose L. Beltran
Keyword(s):  
Binary Mixtures ◽  
Solvent Effects ◽  
Uv Spectroscopy ◽  
Spectroscopy Method

Research of possibility of UV-spectroscopy method and luminescent analysis for detecting fatty pollution in chladon

2018 ◽  
Author(s):  
O. A. Fedyaeva ◽  
E. G. Poshelyuzhnaya ◽  
V. A. Zakharov ◽  
D. A. Kuleshov ◽  
T. E. Fisenko ◽  
...  
Keyword(s):  
Uv Spectroscopy ◽  
Spectroscopy Method ◽  
Luminescent Analysis

Substituent and solvent effects on the reaction between 2,6-Di-t-butyl-α-(3,5-di-t-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)-p-tolyloxyl (galvinoxyl) and phenols

1978 ◽  
Vol 31 (6) ◽  
pp. 1201 ◽  
Author(s):  
N Nishimura ◽  
K Okahashi ◽  
T Yukutomi ◽  
A Fujiwara ◽  
S Kubo
Keyword(s):  
Carbon Tetrachloride ◽  
Binary Mixtures ◽  
Solvent Effects ◽  
Rate Constants ◽  
Isotope Effects ◽  
Mixed Solvents ◽  
Transition States ◽  
Activation Parameters ◽  
Substituted Phenols ◽  
Kinetic Behaviour

Rate constants and associated activation parameters for the reaction of galvinoxyl with substituted phenols were obtained in carbon tetrachloride and in cyclohexane-dioxan binary mixtures. Substantial isotope effects were observed for O-deuterated phenols. The rate constants are correlated with σ+ values. These findings are discussed by considering the polar contribution of substituents to the stabilization of the transition states. In the mixed solvents, the kinetic behaviour is well expressed by the equations which are based on the theory of Kondo and Tokura.

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