Densities and viscosities of binary aqueous mixtures of nonelectrolytes: tert-Butyl alcohol and tert-butylamine

1994 ◽  
Vol 72 (9) ◽  
pp. 1937-1945 ◽  
Author(s):  
Pius K. Kipkemboi ◽  
Allan J. Easteal
Keyword(s):  
Shear Viscosity ◽  
Composition Range ◽  
Excess Molar Volumes ◽  
Butyl Alcohol ◽  
Aqueous Mixtures ◽  
Rich Region ◽  
Molar Volumes ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Tert Butylamine

The density and shear viscosity of mixtures of tert-butyl alcohol (BuOH) and tert-butylamine (TBA) with water have been determined for various temperatures (288 to 318 K for H2O + BuOH and 288 to 308 K for H2O + TBA) over the whole composition range. Excess molar volumes and apparent molar volumes of the components of each system were calculated from the density data. In both systems the apparent molar volume of the organic component passes through a minimum in the water-rich region. Both systems exhibit large negative excess molar volumes which are essentially independent of temperature at all compositions. The two systems show pronounced maxima in their shear viscosity isotherms.

Vibrational spectroscopic studies of aqueous solutions of tert-butyl alcohol and tert-butylamine

2002 ◽  
Vol 80 (7) ◽  
pp. 789-795 ◽  
Author(s):  
Pius K Kipkemboi ◽  
Allan J Easteal
Keyword(s):  
Aqueous Solutions ◽  
Hydrophobic Interactions ◽  
Binary Solution ◽  
Spectroscopic Studies ◽  
Butyl Alcohol ◽  
Ir Absorption ◽  
Dilute Solutions ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Tert Butylamine

Raman and FT-IR absorption spectra of aqueous tert-butyl alcohol (t-BuOH) and tert-butylamine (t-BuNH2) in the region of the O–H and NH2 stretching and bending modes have been measured as a function of organic co-solvent concentration in the whole co-solvent mole fraction region. The major observed changes of the aqueous binary solution spectra compared with the solvent spectra are a loss or gain of band intensity. In particular, the observed changes in intensities and linewidths of some bands were significantly more pronounced at low concentrations of organic co-solvents in water, where t-BuOH and t-BuNH2 tend to integrate into the water structure. Clear evidence of structural enhancement of the network is obtained in dilute solutions as well as destruction of the network by hydrophobic interactions as the concentration is increased. Generally, the interpretation of the spectra is in agreement with the capacity of the hydrophobic co-solvent to break the structure of water in the more concentrated aqueous solutions and to enhance the structure in dilute solutions. Vibrational intensities and frequency shifts of some bands show definite trends with varying the concentration of the solutions. In the concentration-dependence study, unusual linewidth changes of certain bands were observed.Key words: infrared, Raman spectra, aqueous, tert-butanol, tert-butylamine.

Viscosity of ternary mixtures. IV. Urea – tert-butyl alcohol – water at 25 °C

1981 ◽  
Vol 59 (23) ◽  
pp. 3248-3251 ◽  
Author(s):  
Marc Palma ◽  
Jean-Pierre Morel
Keyword(s):  
Pair Interaction ◽  
Butyl Alcohol ◽  
Ternary Mixtures ◽  
Aqueous Mixtures ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Alcohol Water ◽  
Alcohol Mixtures ◽  
Total Concentrations ◽  
B Coefficients

We have measured, at 25 °C, the viscosities of urea and tert-butyl alcohol ternary aqueous solutions for total concentrations reaching about 4 M and various ratios of the solutes. We have also determined B coefficients of the Jones–Dole law for urea in water–tert-butyl alcohol mixtures and for tert-butyl alcohol in water–urea mixtures. The results can be fitted in the form:[Formula: see text]where ηr is the viscosity relative to water and subscripts 1 and 2 characterise the two solutes. B1 and B2 are determined in water and the additional D parameters appear as pair-interaction contributions of the solutes to the viscosity of the system. Some relations are established and verified between the previous parameters and the B coefficients of 1 and 2 determined, respectively, in the aqueous mixtures of 2 and 1.

Solvent structure in aqueous mixtures. II. Ionic mobilities in tert-butyl alcohol-water mixtures at 25.deg.

1970 ◽  
Vol 74 (21) ◽  
pp. 3802-3812 ◽  
Author(s):  
Tommy L. Broadwater ◽  
Robert L. Kay
Keyword(s):  
Butyl Alcohol ◽  
Solvent Structure ◽  
Aqueous Mixtures ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Alcohol Water ◽  
Ionic Mobilities

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.

Transfer Thermodynamic Functions ∆Gt0, ∆Ht0 and T∆St0 of cis- and trans-[CoCl2(en)2]+ Isomers in Aqueous Mixtures of Methanol, tert-Butyl Alcohol and Acetonitrile

2000 ◽  
Vol 65 (9) ◽  
pp. 1455-1463
Author(s):  
Oľga Vollárová ◽  
Ján Benko
Keyword(s):  
Enthalpy Of Solution ◽  
Transfer Functions ◽  
Partial Molar Volumes ◽  
Butyl Alcohol ◽  
Aqueous Mixtures ◽  
Aqueous Methanol ◽  
Solvent Interactions ◽  
Tert Butyl Alcohol ◽  
Surface Charge Distribution ◽  
Cis And Trans

The solubility, partial molar volume and standard integral molar enthalpy of solution of cis- and trans-[CoCl2(en)2]Cl in water, aqueous methanol, aqueous tert-butyl alcohol and aqueous acetonitrile are reported. The transfer functions ∆Gt0, ∆Ht0 and T∆St0 as well as partial molar volumes are used to obtain information on the solute-solvent interactions. Results obtained are discussed in terms of differences in the surface charge distribution in isomeric coordination species.

scholarly journals Impacts of Sn(II) doping on the Keggin heteropolyacid-catalyzed etherification of glycerol with tert-butyl alcohol

2021 ◽  
pp. 116913
Author(s):  
Márcio José da Silva ◽  
Diego Morais Chaves ◽  
Sukarno Olavo ferreira ◽  
Rene Chagas da Silva ◽  
Jose Balena Gabriel Filho ◽  
...  
Keyword(s):  
Butyl Alcohol ◽  
Tert Butyl ◽  
Tert Butyl Alcohol

Selective synthesis of 2,5-dimethyl-2,4-hexadiene by condensation of iso-butyl aldehyde with tert-butyl alcohol over molecular sieve catalysts

2004 ◽  
Vol 5 (1) ◽  
pp. 41-43 ◽  
Author(s):  
Hua Wang ◽  
Zhongmin Liu ◽  
Chenglin Sun ◽  
Gongwei Wang
Keyword(s):  
Molecular Sieve ◽  
Butyl Alcohol ◽  
Selective Synthesis ◽  
Tert Butyl ◽  
Tert Butyl Alcohol
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