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1.
《Physics and Chemistry of Liquids》2012,50(6):675-681
Abstract New excess volume data have been measured for three ternary mixtures at 303.15 K. The mixtures included N-methylcyclohexylamine and benzene as common components. 1-propanol, 1-butanol and 1-pentanol were chosen as non-common components. The data were compared with those predicted by empirical relations. The experimental results have been analysed in terms of intermolecular interactions between unlike molecules. 相似文献
2.
《Physics and Chemistry of Liquids》2012,50(1-2):27-30
Abstract Isentropic compressibility data, KS of 1,2-Dibromoethane + Propan-1-ol, + butan-1-ol, + pentan-1-ol, hexan-1-ol, heptan-1-ol and octan-1-ol at 303.15 K are reported. Deviations in isentropic compressibility, KS values are found to be negative for mixtures of 1,2-dibromoethane with propan-1-ol over the entire range of composition and while in butan-1-ol the δKS values are negative at lower molefractions and positive at higher molefractions. Therefore as the chain length increases it is showing the positive deviations. The data are interpreted in terms of specific interactions between the components. 相似文献
3.
XIAO Xi LI Hao-ran WANG Cong-min WANG Qi HAN Shi-jun **Department of Chemistry Zhejiang University Hangzhou P. R. China 《高等学校化学研究》2002,18(4):427-429
IntroductionMethylheptenone(CA Registry No. 1 1 0 - 93 -0 ) ,6 - methyl- 5 - hepten- 2 - one,one of theintermediates of isomethpetene synthesis,is atransparent liquid with a strong odor.A survey ofthe literatures shows that there are very fewreports upon the density measurements on thebinary mixtures of MHO and one of alkanols. Tounderstand the nature of MHO and the molecularinteractions between the components of the mixturefurther,the experimental determination on VE isindispensable.The … 相似文献
4.
《Physics and Chemistry of Liquids》2012,50(4):399-404
Densities of the binary mixtures of diethylcarbonate with benzene and substituted benzenes, namely toluene, bromobenzene, chlorobenzene and nitrobenzene have been measured as a function of the composition, at 293.15 K and atmospheric pressure using a bicapillary pycnometer with an accuracy of 4 parts in 104.The calculated excess molar volumes, V E were correlated with Redlich-Kister equation. The excess molar volumes are negative over the entire range of composition for the systems diethylcarbonate with benzene, toluene, bromobenzene and nitrobenzene. An inversion of the sign of V E is observed over some concentration for mixtures of diethylcarbonate with chlorobenzene. Partial molar volumes, Vi are also evaluated and their values have been extrapolated to zero concentration to obtain the limiting value at infinite dilution, Vo i . The numerical values of the excess molar volumes for binary mixtures decrease in the order: chlorobenzene > benzene > bromobenzene ≈ toluene > nitrobenzene. The results are explained in terms of dissociation of the self-associated solute molecules and the formation of aggregates between unlike molecules. 相似文献
5.
Densities (ρ)of the binary systems of {difurylmethane + (ethanol or propan-1-ol or butan-1-ol or pentan-1-ol or hexan-1-ol)} have been measured with an Anton Paar DMA 4500 vibrating-tube densimeter over the entire composition range at 298.15,K and atmospheric pressure. Excess molar volumes (V
m
E
) of each binary system were determined and correlated by the Redlich-Kister equation. Limiting (V
i
E,∞) and excess partial molar volumes (V
i
E
) of components of each binary system have been calculated to provide insight into the intermolecular interactions present and the packing efficiencies. The results have been discussed in terms of specific intermolecular interactions, dispersive forces and structural effects. 相似文献
6.
The excess molar volume (V E), viscosity deviations (Δη) and Gibbs excess energy of activation for viscous flow (G∗E) have been investigated from density (ρ) and viscosity (η) measurements of eight binary mixtures of 1,3-dioxolane with methanol,
ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, t-butanol, and i-amyl alcohol over the entire range of mole fractions at 303.15 K. The viscosity data have been correlated with the Grunberg
and Nissan equation. Furthermore, excess isentropic compressibilities (KSE) have been calculated from ultrasonic speed measurements of these binary mixtures at 303.15 K. The deviations have been fitted
by a Redlich–Kister equation and the results are discussed in terms of molecular interactions and structural effects. The
excess properties are found to be either negative or positive depending on the molecular interactions and the nature of the
liquid mixtures. The systems studied exhibit very strong cross association through hydrogen bonding. 相似文献
7.
F. J. Arroyo F. J. Carmona I. García De La Fuente J. A. González J. C. Cobos 《Journal of solution chemistry》2000,29(8):743-756
Excess molar volumes V
E
m at 25°C and atmospheric pressure over the entirecomposition range for binary mixtures of 1-heptanol with 2,5-dioxahexane, 2,5,8-trioxanonane,5,8,11-trioxapentadecane, 2,5,8,11-tetraoxadodecane,or 2,5,8,11,14-pentaoxapentadecane, and mixtures of 1-nonanol with 2,5-dioxahexane,3,6-dioxaoctane, 2,5,8-trioxanonane, 3,6,9-trioxaundecane, 5,8,11-trioxapentadecane,2,5,8,11-tetraoxadodecane, or 2,5,8,11,14-pentaoxapentadecane are reportedfrom densities measured with a vibrating-tube densimeter.V
E
m curves are nearlysymmetrical at about 0.5 mole fraction. Excess molar volumes are usually positive,indicating predominance of positive contributions to V
E
m from the disruption ofH bonds of alcohols and from physical interactions. When chain lengths ofboth components of the mixture are increased, the contribution from interstitialaccommodation appears to be sufficiently negative, such that V
E
m becomes negative(e.g., l-nonanol + 5,8,11-tetraoxapentadecane). 相似文献
8.
《Physics and Chemistry of Liquids》2012,50(1):103-111
Abstract From dilatometric method at 293.15,303,15, and 313.15K for binary mixtures of water and 1,2-alkane diols, the excess molar volumes, VE and the partial molar volumes, V i of both components at 293.15 K have been obtained as a function of mixtures composition. Excess molar volumes were calculated and correlated by a Redlich-Kister type function in terms of mole fraction. The partial molar volumes have been extrapolated to zero concentration to obtain the limiting values at infinite dilution, V 0 i . All mixtures showed negative values and decreases with the chain length of diols. The values become less negative with increasing temperature. The results are explained in terms of dissociation of the self-associated diol molecules and the formation of aggregates between unlike molecules. 相似文献
9.
《Physics and Chemistry of Liquids》2012,50(1-2):13-20
Abstract Excess molar volumes vE have been measured for the binary liquid mixtures of propyl ethanoate with five n-alkanes (n-hexane, n-heptane, n-octane, n-nonane and n-decane) at 298.15 and 308.15 K, using an Anton Paar densimeter. All the mixtures studied present positive vE values that increase with the length of the chain of the alkane and with the temperature. The experimental results are compared with the predictions of the Nitta—Chao model. 相似文献
10.
Molar excess volumes of acetonitrile with ten n-alkanols (from methanol to decanol) were determined from density measurements at 25°C and normal atmospheric pressure, using a vibrating-tube densimeter. V
E for acetonitrile + methanol mixtures are negative over the entire range of mole fractions. The ethanol and propanol mixtures exhibit sigmoidal curves and positive values are obtained for all remaining mixtures. The results for V
E were compared with those obtained using several theoretical models. 相似文献
11.
《Physics and Chemistry of Liquids》2012,50(2):85-91
Abstract Ultrasonic sound velocities and densities were measured for the binary mixtures of p-chlorotoluene with l-alcohols. The alcohols included: l-propanol, l-butanol, l-pentanol, l-hexanol and l-heptanol. Isentropic compressibilities, ks and deviation in isentropic compressibility, Ks from ideal behaviour have been calculated from the results. The deviation in isentropic compressibility has been ascribed to competition between structure-breaking and structural effects to different extents. 相似文献
12.
Andrzej J. Treszczanowicz Teresa Treszczanowicz Teresa Kasprzycka-Guttman Tomasz S. Pawłowski 《Journal of solution chemistry》2002,31(6):455-466
Excess volumes measured at 25°C are reported for binary mixtures of the C3, C4, C6, C8, and C10 1-alkanols with 1-octene. In this series of mixtures, the excess-volume curves change from positive values over the whole concentration range for short-chain alkanols C3 and C4, to sigmoid for longer-chain alkanols (with positive values in the alkanol-rich region). The positive region decreases with increasing chain length of the 1-alkanol. Excess partial molar volumes of the components are calculated. The results are compared with those for mixtures of 1-alkanols with n-octane. The model of associated mixtures proposed by Treszczanowicz and Benson3 describes very well the size and shape of the excess volume for the class of systems considered. 相似文献
13.
Excess volumes (VE) ultrasonic sound velocities (u), isentropic compressibilities (Ks) and viscosities (η) have been measured for the binary mixtures of dimethylsulphoxide (DMSO) with 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,2,4-trichlorobenzene, o-chlorotoluene, m-chlorotoluene, p-chlorotoluene, o-nitrotoluene and m-nitrotoluene at T = 303.15 K. The measured VE values were positive over the entire composition range in all the binary mixtures. Isentropic compressibilities (Ks) have been computed for the same systems from precise sound velocity and density data. Further, deviation in isentropic compressibility (ΔKs) from ideal behaviour was also calculated. The viscosity data are analysed on the basis of corresponding states approach. Deviation in viscosities are positive over the entire composition range. The measured data is explained on the basis of intermolecular interactions between unlike molecules. 相似文献
14.
Molar excess enthalpies H
m
E have been determined over the whole composition range for mixtures of benzene, methanol, ethanol, 1-propanol, 2-propanol
and 1-butanol with quinoline at 298.15 K using a Thermometric flow calorimeter. The results reflect a strong H-bond association
between an alkanol and quinoline which decreases with increasing length of the alkanol chain. The small H
m
E for (benzene+quinoline) reflects the similarity of the two molecules.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
15.
《Physics and Chemistry of Liquids》2012,50(3):151-154
Abstract New experimental data for excess volume of five binary mixtures are reported at 303.15 K. The mixtures contain 1,1,1-trichloroethane as common component and 1-propanol, 1-butanol, 1-pentanol, 1-hexanol, and 1-heptanol as noncommon components. VE exhibits inversion in sign in all mixtures except that containing 1-pentanol. In this mixture VE is positive over the whole range of composition. The results have been interpreted in terms of the relative strength of structure breaking and structure making effects. 相似文献
16.
Binary excess molar volumes, V
m
E, have been evaluated from density measurements, using a vibrating tube densimeter over the entire composition range for binary
liquid mixtures of ionic liquids 1-ethyl-3-methyl-imidazolium diethyleneglycol monomethylethersulphate [EMIM]+[CH3(OCH2CH2)2OSO3]− or 1-butyl-3-methyl-imidazolium diethyleneglycol monomethylethersulphate [BMIM]+[CH3(OCH2CH2)2OSO3]− or 1-methyl-3-octyl-imidazolium diethyleneglycol monomethylethersulphate [MOIM]+[CH3(OCH2CH2)2OSO3]−+methanol and [EMIM]+[CH3(OCH2CH2)2OSO3]−+water at 298.15, 303.15 and 313.15 K. The V
m
E values were found to be negative for all systems studied. The V
m
E results are explained in terms of intermolecular interactions and packing effects. The experimental data were fitted by the
Redlich-Kister polynomial. 相似文献
17.
J. M. Resa C. González J. Lanz J. A. Mtz. de Ilarduya 《Journal of Thermal Analysis and Calorimetry》1998,52(3):895-901
Excess molar volumes for binary mixtures containing methyl acetate + methylbenzene, ethylbenzene, 1,4-dimethylethylbenzene,
1-methylbenzene, 1,-3,-5-trimethylbenzene or 1,-1-dimethylethylbenzene were determined from density measurements at 298. 15
K using an Anton Paar DMA 58 vibrating tube densitometer. The excess molar volumes were positive throughout the concentration
ranges. The excess molar volumes increase with the size of the hydrocarbon.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
18.
19.
Kimura T. Ozaki T. Nakai Y. Takeda K. Takagi S. 《Journal of Thermal Analysis and Calorimetry》1998,53(1):285-296
The molar excess enthalpies of 1,2- and 1,3-propanediamine+1,2- and 1,3-propanediol have been determined at 298.15 K by using
a twin-microcalorimeter which requires each component liquid 1 to 1.5 cm3 for a series of runs over the whole range of mole fraction. All excess enthalpies are exothermic and large. An equilibrium
constant K1 expressed in terms of mole fractions and standard enthalpy of formation of 1:1 complex have been evaluated by ideal mixtures
of momomeric molecules and their associated complexes.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
20.
Anil Kumar Nain 《Journal of solution chemistry》2007,36(4):497-516
The densities of binary mixtures of formamide (FA) with 1-butanol, 2-butanol, 1,3-butanediol, and 1,4-butanediol, including
those of the pure liquids, over the entire composition range were measured at temperatures (293.15, 298.15, 303.15, 308.15,
313.15 and 318.15) K and atmospheric pressure. From the experimental data, the excess molar volume, V
m
E, partial molar volumes, and , at infinite dilution, and excess partial molar volumes, and , at infinite dilution were calculated. The variation of these parameters with composition and temperature of the mixtures
are discussed in terms of molecular interactions in these mixtures. The partial molar expansivities, and , at infinite dilution and excess partial molar expansivities, and , at infinite dilution were also calculated. The V
m
E values were found to be positive for all the mixtures at each temperature studied, except for FA + 1-butanol which exhibits
a sigmoid trend wherein V
m
E values change sign from positive to negative as the concentration of FA in the mixture is increased. The V
m
E values for these mixtures follow the order: 1-butanol < 2-butanol < 1,3-butanediol < 1,4-butanediol. It is observed that
the V
m
E values depend upon the number and position of hydroxyl groups in these alkanol molecules. 相似文献