Excess partial molal heat capacities of n-tetraamylammonium bromide in water from 10 to 80.deg. and in aqueous tert-butyl alcohol solvent system at 30.deg. and the effects on the water structure

1972 ◽  
Vol 76 (18) ◽  
pp. 2577-2581 ◽  
Author(s):  
R. K. Mohanty ◽  
S. Sunder ◽  
J. C. Ahluwalia
Keyword(s):  
Water Structure ◽  
Solvent System ◽  
Butyl Alcohol ◽  
Heat Capacities ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Alcohol Solvent ◽  
Partial Molal Heat Capacities

The reaction between 2,2-di(4-nitrophenyl)1,1,1-trifluoroethane and tert-butoxide ion in tert-butyl alcohol solvent

1980 ◽  
Vol 58 (18) ◽  
pp. 1979-1982 ◽  
Author(s):  
Arnold Jarczewski ◽  
Kenneth T. Leffek
Keyword(s):  
Isotope Effects ◽  
Activation Parameters ◽  
Butyl Alcohol ◽  
Blue Colour ◽  
Butyl Ether ◽  
Tert Butyl ◽  
Kinetic Isotope ◽  
Tert Butyl Alcohol ◽  
Reaction Proceeds ◽  
Alcohol Solvent

The reaction between 2,2-di(4-nitrophenyl) 1,1,1-trifluoroethane and excess sodium tert-butoxide in tert-butyl alcohol takes place rapidly to yield first the olefin, by elimination of HF. This is followed by a slower addition of tert-butoxide to the olefin, which upon reaction with the solvent gives the tert-butyl ether as the final product. The blue anions involved in each of these reactions are observed.Rate constants, the primary deuterium kinetic isotope effects, and the activation parameters have been measured for the appearance of the initial blue colour and also for the formation of the olefin. It is concluded that the reaction proceeds by a reversible ElcB mechanism.

Formation of Zinc–Peptide Spherical Microparticles During Lyophilization from tert-Butyl Alcohol/Water Co-solvent System

2008 ◽  
Vol 25 (12) ◽  
pp. 2799-2806 ◽  
Author(s):  
Feng Qian ◽  
Nina Ni ◽  
Jia-Wen Chen ◽  
Sridhar Desikan ◽  
Vijay Naringrekar ◽  
...  
Keyword(s):  
Solvent System ◽  
Butyl Alcohol ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Alcohol Water ◽  
Spherical Microparticles

Enthalpies, heat capacities, and volumes of transfer of the tetrabutylammonium ion from water to aqueous mixed solvents from the point of view of the scaled-particle theory

1976 ◽  
Vol 54 (23) ◽  
pp. 3800-3808 ◽  
Author(s):  
Nicole Desrosiers ◽  
Jacques E. Desnoyers
Keyword(s):  
Mixed Solvents ◽  
Butyl Alcohol ◽  
Heat Capacities ◽  
Point Of View ◽  
Scaled Particle Theory ◽  
Particle Theory ◽  
Tert Butyl ◽  
Tetrabutylammonium Ion ◽  
Tert Butyl Alcohol ◽  
Alcohol Water

The enthalpies, heat capacities, and volumes of transfer of the tetrabutylammonium ion from water to urea–water, tert-butyl alcohol–water, and sodium chloride–water mixtures have been calculated at 25 °C using the scaled-particle theory. In general, the signs, magnitudes, and overall trends in the cosolvent concentration dependence of the properties are predicted from the cavity contributions only. These calculations are found to be very sensitive to the diameters chosen for the various species.For these calculations it was necessary to measure with a dilatometer the coefficients of thermal expansion of tert-butyl alcohol–water mixtures as a function of concentration and temperature.

The heat capacities, volumes, and expansibilities of tert-butyl alcohol – water mixtures from 6 to 65 °C

1977 ◽  
Vol 55 (5) ◽  
pp. 856-862 ◽  
Author(s):  
Cees de Visser ◽  
Gerald Perron ◽  
Jacques E. Desnoyers
Keyword(s):  
Microphase Separation ◽  
Butyl Alcohol ◽  
Heat Capacities ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Alcohol Water ◽  
Order Of Magnitude ◽  
Hydrophobic Solutes ◽  
High Concentrations ◽  
Specific Heat Capacities

The densities and specific heat capacities of mixtures of tert-butyl alcohol (TBA) and water (W) have been measured at 6, 10, 25, 40, 55, and 65 °C. From these data the apparent molal volumes[Formula: see text], heat capacities[Formula: see text], and expansibilities [Formula: see text] were evaluated. Generally, the temperature dependence of these quantities is rather characteristic of hydrophobic solutes in water. At high concentrations [Formula: see text]and [Formula: see text] resemble those of surfactants, suggesting the existence of some microphase separation. At low temperatures [Formula: see text] show a significant hump as a function of concentration, which is probably not due to the presence of the —OH group on the TBA molecule. A similar behaviour is observed for[Formula: see text]. The [Formula: see text] and [Formula: see text] of water in TBA have also been calculated; [Formula: see text] is in theTBA-rich region 2 to 2.5 cm3 mol−1 smaller than the molar volume of water, but [Formula: see text] is of the same order of magnitude as the molar heat capacity of water.

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