Excess molar volumes, excess isentropic compressibilities, excess viscosities, relative permittivity and molar polarization deviations for methyl acetate+, ethyl acetate+, butyl acetate+, isoamyl acetate+, methyl propionate+, ethyl propionate+, ethyl butyrate+, methyl methacrylate+, ethyl methacrylate+, and butyl methacrylate+cyclohexane at T=298.15 and 303.15K

2013 ◽  
Vol 183 ◽  
pp. 102-112 ◽  
Author(s):  
Nandhibatla V. Sastry ◽  
Sunil R. Patel ◽  
Saurabh S. Soni
Keyword(s):  
Methyl Acetate ◽  
Butyl Acetate ◽  
Excess Molar Volumes ◽  
Isoamyl Acetate ◽  
Butyl Methacrylate ◽  
Ethyl Propionate ◽  
Excess Isentropic Compressibilities ◽  
Excess Viscosities ◽  
Acetate Methyl ◽  
Molar Polarization

C=O Stretching vibrations in Raman and infrared spectra of simple esters

1982 ◽  
Vol 47 (8) ◽  
pp. 2027-2036 ◽  
Author(s):  
Jiří Dybal ◽  
Jan Štokr ◽  
Bohdan Schneider
Keyword(s):  
Infrared Spectra ◽  
Methyl Acetate ◽  
Butyl Acetate ◽  
Dielectric Constants ◽  
Fermi Resonance ◽  
Conformational Structure ◽  
Infrared And Raman Spectra ◽  
Tert Butyl ◽  
Acetate Methyl ◽  
Stretching Vibrations

Infrared and Raman spectra of methyl acetate, tert-butyl acetate, methyl pivalate and tert-butyl pivalate were measured in the liquid and crystalline states and solutions of different dielectric constants. In these molecules, the bands of the C=O str. vibrations are not affected by conformational structure. The shape and position of the band of the C=O str. vibration in methyl acetate are primarily determined by intermolecular order created by interactions of the permanent dipoles of the molecules. In methyl pivalate and in tert-butyl acetate, the shape of the carbonyl band is mainly determined by Fermi resonance.

scholarly journals Thermophysical properties of binary blends of cyclohexane with some esters

2017 ◽  
Vol 82 (2) ◽  
pp. 189-202
Author(s):  
Rajendra Pradhan ◽  
Biswajit Sinha
Keyword(s):  
Methyl Acetate ◽  
Excess Molar Volumes ◽  
Partial Molar Volumes ◽  
Volume Changes ◽  
Pfp Theory ◽  
Excess Isentropic Compressibilities ◽  
Binary Blends ◽  
Molar Volumes ◽  
Derived Properties ◽  
Robinson Equation

From the densities (?) and viscosities (?) measured for three binary blends consisting of methyl acetate (MA), ethyl acetate (EA) and methyl salicylate (MS) over the entire composition range with cyclohexane (CH) at 298.15?318.15 K under atmospheric pressure, the excess molar volumes (VEm ) and excess viscosities (?E) were derived. In addition, the excess isentropic compressibilities (KEs ) excess intermolecular free lengths (LEf) and excess molar refractions (R Em) were derived from measured ultrasonic speeds of sound (u) and refractive indices (nD) for the binary blends at 298.15 K. Various derived properties are discussed in terms of molecular interactions and structural effects. Partial molar volumes ( 0 Vm,1 and 0 Vm,2 ) and excess partial molar volumes ( 0,E Vm,1 and 0,E Vm,2 ) at infinite dilution are also discussed in terms of volume changes in the blends. Furthermore, the excess molar volumes (V Em ) and viscosities (?) of the blends were correlated with the Prigogine?Flory?Paterson (PFP) theory and the Peng?Robinson Equation of State (PR-EOS).

The Flavor Property of Soft Cheese Fermented by Two Stains of Streptococcus thermophilus and Made of Reconstituted Milk

2011 ◽  
Vol 396-398 ◽  
pp. 1536-1540
Author(s):  
Yan Hua Li ◽  
Lan Wei Zhang ◽  
Wei Jun Wang ◽  
Li Li Zhang ◽  
Xue Han ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Butyl Acetate ◽  
Streptococcus Thermophilus ◽  
Acetate Methyl ◽  
Soft Cheese ◽  
Significant Difference ◽  
Cheese Volatiles ◽  
Methyl Butyrate ◽  
Reconstituted Milk ◽  
The Impact

The effect of reconstituted milk inoculation with Streptococcus thermophilus TM11 and Streptococcus thermophilus SP 1.1 on soft cheese volatiles was investigated. The impact flavors of 2,3-butanedione, 2,3-pentanedione, ethyl acetate, methyl butyrate, ethyl butyrate, butyl acetate and butyric acid were only detected in the fermented cheeses. Levels of diketones were higher in the cheeses fermented by mixed cultures than single culture, while levels of esters except ethyl acetate and butyl acetate showed an opposite tendency. There was significant difference in the levels of 2-hexenal and 2-nonenal among the cheeses. Other compounds originated from lipid oxidation, Strecker degradation, biosynthesis and forages were not significantly influenced by milk inoculation with Streptococcus thermophilus.

scholarly journals Study of Refractive Indices and Its Theories for Mixtures of N, N-Diethylethanamine and Acetates

2020 ◽  
Vol 12 (3) ◽  
pp. 363-370
Author(s):  
P. Tyagi ◽  
K. Kumar ◽  
M. Rani ◽  
N. Sabharwal
Keyword(s):  
Experimental Data ◽  
Methyl Acetate ◽  
Butyl Acetate ◽  
Composition Range ◽  
Polynomial Equation ◽  
Carbon Chain ◽  
Refractive Indices ◽  
Carbon Chain Length ◽  
Propyl Acetate ◽  
Empirical Correlations

This paper reports the refractive indices ( ) of N,N-diethylethanamine + methyl acetate, ethyl acetate, propyl acetate, butyl acetate and pentyl acetate at 298.15 K and at different composition range. The various empirical correlations like Arago-Biot (AB), Gladstone-Dale (GD), Lorentz-Lorenz (L-L) Heller (H), Weiner (W), Newton (Nw) and Erying-John (E-J) were applied to experimental data for estimating theoretical value of refractive indices. For an equimolar mixture, the predicted deviation in refractive index values is consistent well with the experimental data. It has been found that the interactions between amine and different esters decrease when carbon chain length in ester increases. Also refractive indices are affected with change in temperature. To evaluate the standard deviation, RK polynomial equation was fitted to the measured refractive indices data.

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