Thermodynamics of mixtures containing oxaalkanes. 6. Random mixing in ether+benzene, or +toluene systems

González, Juan Antonio; Fuenté, Isaiás García de la; Cobos, José Carlos; Mozo, Ismael; Alonso, Iván

doi:10.1016/j.tca.2010.11.023

Cited by 9 publications

(17 citation statements)

References 97 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The V E data of o -CT (1) + toluene or o -xylene (2) at (298.15 and 308.15) K, V E data of THP (1) + benzene or toluene (2), and κ S E values of THP (1) + benzene (2) mixtures at 298.15 K are reported in the literature. Our V E values for these mixtures are in agreement with literature values ,,− (shown in Figures , , and ). Further, experimental V E and κ S E values for THP (1) + benzene or toluene or o -xylene (2) mixtures at 303.15 K are (0.005, 0.001, and 0.008) cm 3 ·mol –1 , (4.8, 0.7, and 1.0) TPa –1 lower than the V E and κ S E values at 308.15 K .…”

Section: Discussionsupporting

confidence: 92%

Thermodynamic Properties of Ternary Liquid Mixtures Containing o-Chlorotoluene: Excess Molar Volumes and Excess Isentropic Compressibilities

2014

View full text Add to dashboard Cite

Densities and speeds of sound of ternary o-chlorotoluene (1) + tetrahydropyran (2) + benzene or toluene or o-xylene (3) mixtures and their subbinaries o-chlorotoluene (1) + toluene or o-xylene (2) at (298.15, 303.15, and 308.15) K have been measured, and of tetrahydropyran (1) + benzene or toluene or o-xylene (2) mixtures at (298.15 and 303.15) K and 0.1 MPa. Excess molar volumes, V 123 E and V E , and excess isentropic compressibilities, (κ S E ) 123 and κ S E , have been computed from experimental data. The V 123 E for o-chlorotoluene (1) + tetrahydropyran (2) + o-xylene (3) and (κ S E ) 123 for o-chlorotoluene (1) + tetrahydropyran (2) + benzene or toluene or o-xylene (3) are negative over the entire mole fraction of 1 and 2. However, the sign and magnitude of V 123 E for ochlorotoluene (1) + tetrahydropyran (2) + benzene or toluene (3) mixtures are dictated by the relative proportion of the constituents. The excess functions have been analyzed in terms of Graph theory, Prigogine−Flory−Patterson theory, and Sanchez and Lacombe's theories.

show abstract

Section: Discussionsupporting

confidence: 92%

Thermodynamic Properties of Ternary Liquid Mixtures Containing o-Chlorotoluene: Excess Molar Volumes and Excess Isentropic Compressibilities

2014

View full text Add to dashboard Cite

show abstract

“…All the symbols have their usual meaning [22]. In equation (11), the term which depends directly on X 12 is the interaction contribution to E m H .…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…For the application of this expression, we note that VT is a function of E m H : * * * * E * * * * 1 1 1 2 2 2 m 1 1 1 1 2 2 2 2 12 14) and that from the equation of state, () V V T  . More details have been given elsewhere [20][21][22].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

See 1 more Smart Citation

Thermodynamics of amide + ketone mixtures. 2. Volumetric, speed of sound and refractive index data for N,N-dimethylacetamide + 2-alkanone systems at several temperatures. Application of Flory's model to tertiary amide +n-alkanone systems

Cobos

González

Hevia

et al. 2017

Journal of Molecular Liquids

Self Cite

View full text Add to dashboard Cite

of amide+ketone mixtures. 2. Volumetric, speed of sound and refractive index data for N,N-dimethylacetamide+2-alkanone systems at several temperatures. Application of Flory's model to tertiary amide+n-alkanone systems. AbstractData on density,  , speed of sound, c, and refractive index, D n , have been reported at (293-303.15) K for the N,N-dimethylacetamide (DMA)+ CH 3 CO(CH 2 ) u-1 CH 3 (u = 1,2,3) systems, and at 298.15 K for the mixture with u = 5. These data have been used to compute excess molar volumes, E m V , excess adiabatic compressibilities, E S  , and excess speeds of sound E c . Negative E m V values indicate the existence of structural effects and interactions between unlike molecules. From molar excess enthalpies, E m H , available in the literature for N,Ndimethylformamide (DMF), or N-methylpyrrolidone (NMP) + n-alkanone systems, it is shown: (i) amide-ketone interactions are stronger in DMF systems than in those with NMP; (ii) they become weaker when u increases in mixtures with a given amide. Structural effects largely contribute to E m H and are more relevant in mixtures containing NMP. The application of the Flory's model reveals that the random mixing hypothesis is valid in large extent for DMF solutions, while NMP systems are characterized by rather strong orientational effects. From values of molar refraction and of the product int P m V (where int P is the internal pressure and mV the molar volume), it is concluded that dispersive interactions increase with u, or when DMF is replaced by DMA in mixtures with a fixed ketone. 1.amides makes also very interesting their theoretical study [11]. In the case of N,Ndialkylamides, due to the lack of hydrogen-bonds, this has been attributed to the existence of strong dipolar interactions [10,12].2-Alkanones, (CH 3 CO(CH 2 ) u-1 CH 3 ) are polar, aprotic compounds and hydrogen bonds acceptors, used as solvents for plastics and some synthetic fibers or as intermediates in the obtention of very important compounds (e.g., methyl methacrylate). They have also an essential role in biochemistry, as many sugars are ketones, and fatty acid synthesis proceeds via these compounds. These features make suitable the study of amide + alkanone mixtures, which must be taken into account within a general experimental and theoretical research of liquid mixtures containing the functional groups carbonyl, amine or amide. In a previous work, we have provided data on density,  , speeds of sound, c, and refractive indices, D n , at (293.15-303.15) K for DMF systems with u = 1,2,3 and at 298.15 K for the solution with u = 5 [13]. As a continuation of this research, we report now similar data for binary mixtures containing N,Ndimethylacetamide (DMA) and the same 2-alkanones over the same temperature range. In order to complete our study, data available in the literature on N-methylpyrrolidone (NMP) + nalkanone systems are also considered [14][15][16][17]. This allows examine the dependence of thermophysical properties on the size and shape of the amide in systems with a...

show abstract

“…We are engaged in a systematic investigation on orientational effects (i.e., non-random mixing) in mixtures of organic liquids by means of the application of different models, such as: DISQUAC [1], ERAS [2], Flory [3], Kirkwood-Buff integrals [4,5] or the (0) CC S (concentration-concentration structure factor) formalism [6]. In this framework, along a series of works, we have shown that the Flory model is suitable to gain insight into orientational effects present in systems of the type: 1-alkanol + linear alkanone [7], or + nitrile [8], or + linear or cyclic ether [9,10]; 1-butanol + alkoxyethanol [11], alkoxyethanol + dibutyl ether [11], oxaalkane + alkane [12], or + aromatic compound [13]. Now, we extend these previous studies to alkanone, or alkanal or linear organic carbonate + alkane mixtures.…”

Section: Introductionmentioning

confidence: 97%

Orientational effects in alkanone, alkanal or dialkyl carbonate + alkane mixtures and in alkanone + alkanone or + dialkyl carbonate systems

Hevia

González

Alonso-Tristán

et al. 2017

Journal of Molecular Liquids

Self Cite

View full text Add to dashboard Cite

Interactions and structure of alkanone, or alkanal or dialkyl carbonate + alkane mixtures, or of 2-alkanone+ 2-alkanone, or of ketone + dialkyl carbonate systems have been investigated by means of a set of thermodynamic properties and by the application of the Flory model. The properties considered are excess molar quantities: enthalpies, E m H , volumes, E m V , or isobaric heat capacities, E pm C , and liquid-liquid equilibria. Experimental data show that alkane mixtures are characterized by rather strong dipolar interactions. In the case of systems containing ketones with the same number of C atoms and a given alkane, dipolar interactions become weaker in the sequence: aromatic > cyclic > linear. In addition, the mentioned interactions become also weaker in the order: dialkyl carbonate > linear alkanone > linear alkanal. This is an important result, as carbonates show lower effective dipole moments than the other compounds, and it suggests that the group size may be relevant when evaluating thermodynamic properties of liquid mixtures. Results on E m H from the Flory model show that orientational effects (i.e., nonrandom mixing) are rather similar for systems with linear, cyclic or aromatic ketones or alkanals and alkanes. In contrast, orientational effects become weaker in dialkyl carbonate + alkane mixtures. The behaviour of 2-alkanone + 2-akanone systems and of mixtures of longer 2alkanones or cyclohexanone with dialkyl carbonate is close to random mixing. Larger orientational effects are encountered in solutions of carbonates and shorter 2-alkanones.

show abstract

Thermodynamics of mixtures containing oxaalkanes. 6. Random mixing in ether+benzene, or +toluene systems

Cited by 9 publications

References 97 publications

Thermodynamic Properties of Ternary Liquid Mixtures Containing o-Chlorotoluene: Excess Molar Volumes and Excess Isentropic Compressibilities

Thermodynamic Properties of Ternary Liquid Mixtures Containing o-Chlorotoluene: Excess Molar Volumes and Excess Isentropic Compressibilities

Thermodynamics of amide + ketone mixtures. 2. Volumetric, speed of sound and refractive index data for N,N-dimethylacetamide + 2-alkanone systems at several temperatures. Application of Flory's model to tertiary amide +n-alkanone systems

Orientational effects in alkanone, alkanal or dialkyl carbonate + alkane mixtures and in alkanone + alkanone or + dialkyl carbonate systems

Contact Info

Product

Resources

About