Solvent effects on chemical processes: new solvents designed on the basis of the molecular–microscopic properties of (molecular solvent + 1,3-dialkylimidazolium) binary mixtures

2008 ◽  
Vol 21 (2) ◽  
pp. 87-95 ◽  
Author(s):  
P. M. Mancini ◽  
G. G. Fortunato ◽  
C. G. Adam ◽  
L. R. Vottero
Keyword(s):  
Binary Mixtures ◽  
Solvent Effects ◽  
Chemical Processes

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

Solvent effect - Classification of parameters describing influence of solvents

1983 ◽  
Vol 48 (11) ◽  
pp. 3287-3306 ◽  
Author(s):  
Petr Svoboda ◽  
Oldřich Pytela ◽  
Miroslav Večeřa
Keyword(s):  
Factor Analysis ◽  
Solvent Effect ◽  
Solvent Effects ◽  
Reaction Mechanisms ◽  
Chemical Processes ◽  
Point Of View ◽  
Regression Coefficients ◽  
Orthogonal Set ◽  
Influence Of Solvents

On the basis of factor analysis of data matrices containing 35 empirical and non-empirical parameters for 85 solvents (or a limited matrix of 20 parameters for 51 solvents), an orthogonal set of parameters with normed normal distribution has been suggested which characterizes influence of the solvents on chemical processes. A four-parameter equation has been suggested for description of the solvent effect in the form A = A0 + aAP + bBP + eEP + pPP, where AP, BP, EP, PP are newly introduced parameters expressing individual types of interactions between solvent and solute. A comparison has been carried out of these parameters with those defined earlier. The new set of parameters was tested with 22 examples taken from literature. The correlations obtained show higher or comparable agreement as compared with those carried out earlier. Values of the regression coefficients make it possible to discuss the reaction mechanisms from the point of view of solvent effects.

scholarly journals Evaluation of viscosity in binary mixtures of dimethyl sulphoxide at 298.15K

2021 ◽  
Vol 10 (5) ◽  
pp. 169-175
Author(s):  
Shipra Baluja
Keyword(s):  
Binary Mixtures ◽  
Excess Free Energy ◽  
Chemical Processes ◽  
Dimethyl Sulphoxide ◽  
Viscosity Data ◽  
Strength Of Interaction ◽  
Tertiary Butanol ◽  
Energy Of Mixing ◽  
Free Energy Of Mixing ◽  
Experimental Values

The viscosity of binary mixtures of dimethyl sulphoxide with different alcohols such as methanol, ethanol, 1-propanol, iso-propanol, 1-butanol, iso-butanol, tertiary butanol has been determined at 298.15K. The experimental values are compared with theoretical values evaluated by different theories. It is observed that for some theories, values are in agreement with the experimental values. Further, an attempt has been made to study the intermolecular interactions in studied solutions in terms of excess free energy of mixing, strength of interaction parameters and interaction energy. The viscosity data of pure liquids and their mixtures are needed to design various chemical processes where heat and mass transfer are important.

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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