Calorimetric determination of azide-ion binding by ferrihemoglobin A in water and in 5% tert-butyl alcohol

1973 ◽  
Vol 95 (3) ◽  
pp. 904-908 ◽  
Author(s):  
A. C. I. Anusiem ◽  
R. Lumry
Keyword(s):  
Butyl Alcohol ◽  
Ion Binding ◽  
Tert Butyl ◽  
Azide Ion ◽  
Tert Butyl Alcohol ◽  
Calorimetric Determination

scholarly journals Determination of the dipole moments of some polar liquids dissolved in polar solvents

1969 ◽  
Vol 47 (20) ◽  
pp. 3767-3771 ◽  
Author(s):  
H. A. Rizk ◽  
N. Youssef ◽  
H. Grace
Keyword(s):  
Dipole Moments ◽  
Butyl Alcohol ◽  
Polar Solvents ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Initial Decrease ◽  
Interacting Systems ◽  
Solvent Molecules ◽  
Onsager Equation

The application of a modified form of the Onsager equation at the condition of infinite dilution of a polar solute in a polar solvent leads to reasonable dipole moments for water, pyridine, acetone, tert-butyl alcohol, n-butyl alcohol, and β-octyl alcohol, except in the case of water in tert-butyl alcohol at 30 and 40 °C and the case of acetone in n-butyl alcohol at 30 to 50 °C. The initial decrease of the dielectric constant of solvent by addition of solute in each of these two cases is associated with a reduction in the Kirkwood g-factor of solute. In all 12 systems investigated, strong hydrogen bonding occurs between solute and solvent molecules and often between solvent molecules themselves. It is thought that this equation must fail when short-range interactions assume predominant importance, but why it works so well for those cases which are also strongly interacting systems is not clear.

Esters chromiques dérivés du tertiobutanol

1976 ◽  
Vol 54 (4) ◽  
pp. 572-575
Author(s):  
Jean-Marie Hachey ◽  
Hélène Ghali ◽  
Jean-Baptiste Savard
Keyword(s):  
Chromium Content ◽  
Chromium Trioxide ◽  
Butyl Alcohol ◽  
Tert Butyl ◽  
Tert Butyl Alcohol

The composition of the mixture of chromate esters obtained from the reaction between tert-butyl alcohol and increasing amounts of chromium trioxide has been calculated from the pmr spectrum and confirmed through the determination of the chromium content of these mixtures. The chromate esters formed are the ditertiarybutyl mono-, di-, and trichromate.

A new method for the determination of the relative acidities of alcohols in alcoholic solutions. The nucleophilicities and competitive reactivities of alkoxides and phenoxides

1979 ◽  
Vol 57 (20) ◽  
pp. 2747-2754 ◽  
Author(s):  
Wilkins Reeve ◽  
Charles M. Erikson ◽  
Patrick F. Aluotto
Keyword(s):  
Isopropyl Alcohol ◽  
Butyl Alcohol ◽  
New Method ◽  
Butyl Bromide ◽  
Tert Butyl ◽  
Ether Mixture ◽  
Tert Butyl Alcohol ◽  
Relative Nucleophilicity ◽  
Semiquantitative Method

A new semiquantitative method has been developed for measuring the relative acidities of methanol, ethanol, isopropyl alcohol, and tert-butyl alcohol in mixed hydroxylic solvents. A solution of the alkoxides of two alcohols in an excess of the two alcohols is allowed to react with n-butyl bromide to form a mixture of two ethers. The composition of the ether mixture is a measure of the "competitive reactivity" of thetwo alkoxides. This can be measured directly, and in theory can be factored into two components: the relative nucleophilicity and the relative basicity of the two alkoxides. Relative nucleophilicities are determined by using solutions in which phenol is one component. Knowing the competitive reactivities and nucleophilicities, the relative acidities of methanol, ethanol, isopropyl alcohol, and tert-butyl alcohol in alcoholic media are shown to be 4.4, 1.0, 0.24, and 0.21, respectively. The relative nucleophilicities of hydroxide, methoxide, ethoxide, isopropoxide, tert-butoxide, phenoxide, and m-cresoxide are 0.08, 0.82, 1.0, 0.4, 0.04, 0.46, and 0.57 respectively.

Thermodynamic and Kinetic Investigation of the Solvent Effect on the Oxidation of [Co(en)2SCH2COO]+ with S2O82- In Water-Methanol and Water-tert-Butyl Alcohol Mixtures

1993 ◽  
Vol 58 (5) ◽  
pp. 1001-1006 ◽  
Author(s):  
Oľga Vollárová ◽  
Ján Benko
Keyword(s):  
Transfer Functions ◽  
Activation Parameters ◽  
Butyl Alcohol ◽  
Oxidation Of Co ◽  
Kinetics Of Oxidation ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Alcohol Mixtures ◽  
Kinetics Of

The kinetics of oxidation of [Co(en)2SCH2COO]+ with S2O82- was studied in water-methanol and water-tert-butyl alcohol mixtures. Changes in the reaction activation parameters ∆H≠ and ∆S≠ with varying concentration of the co-solvent depend on the kind of the latter, which points to a significant role of salvation effects. The solvation effect on the reaction is discussed based on a comparison of the transfer functions ∆Ht0, ∆St0 and ∆Gt0 for the initial and transition states with the changes in the activation parameters accompanying changes in the CO-solvent concentration. The transfer enthalpies of the reactant were obtained from calorimetric measurements.

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