Binary Mixtures Of Dimethyl Sulfoxide Research Articles

Measurements and Theoretical Analysis of Excess Molar Volumes for Binary Mixtures of Dimethyl Sulfoxide with Xylenes

Excess molar volumes, VE, have been measured for binary liquid mixtures of dimethyl sulfoxide (DMSO) with xylenes (o- xylene, m- xylene and p-xylene) at 298.15 K and atmospheric pressure. The excess volumes values were found negative over the entire composition range for all the mixtures. The VE values increase in order: p-xylene[ m-xylene[ o-xylene. The Flory and Prigogine-Flory-Patterson (PFP) thermodynamic theories of solution have been used to analyze the VE data. The calculated VE values were found to be in good agreement with the experimental data.

Thermodynamic and transport properties of binary mixtures of dimethyl sulfoxide with t-butyl alcohol, butyl acetate, 2-butanone and butyl amine at different temperatures

Densities and viscosities of binary mixtures of dimethyl sulfoxide (DMSO) with tert-butyl alcohol, butyl acetate, butanone, and butyl amine were determined over the entire range of mole fractions at temperatures of 298.15, 308.15, and 318.15 K. At each temperature, the excess molar volume (V E ), viscosity deviations (Δη), and Gibbs excess free energy of activation for viscous flow (ΔG *E ) have been investigated from these measured density (ρ) and viscosity (η) values. The experimental viscosity data were correlated by means of the equations of Grunberg-Nissan, Tamura and Kurata, and Hind et al. The deviations have been fitted to a Redlich-Kister equation, and the results are discussed in terms of molecular interactions and structural effects.

Thermodynamic Investigation of Dimethyl Sulfoxide Binary Mixtures at 293.15 and 313.15 K

Densities (ρ), speeds of sound (u), and isentropic compressibilities (kS) of binary mixtures of dimethyl sulfoxide (DMSO) with water, methanol, ethanol, 1-propanol, 2-propanol, acetone and cyclohexanone have been measured over the entire composition range at 293.15 and 313.15 K. The excess molar volumes (VE), the deviations in speed of sound (uE) and the deviations in isentropic compressibility (kSE) have been determined. The VE, uE and kSE values were fitted by the Redlich-Kister polynomial equation and the Ak coefficients as well as the standard deviations (d) between the calculated and experimental values have been derived. The results obtained are discussed from the viewpoint of the existence of interactions between the components of the binary mixtures.

Volumetric and Ultrasonic Studies of Molecular Interactions in Binary Mixtures of Dimethyl Sulfoxide with Some Aromatic Hydrocarbons at Different Temperatures

Abstract The densities (ρ) and ultrasonic speeds (u) of pure dimethyl sulfoxide (DMSO), benzene, toluene, o-xylene, m-xylene, p-xylene, and mesitylene, and those of their binary mixtures, with DMSO as the common component, over the whole composition range have been measured at 298.15, 303.15, 308.15, 313.15, and 318.15 K. The excess molar volume (VE), deviation in isentropic compressibility (Δks), apparent molar volume (Vφ,2), apparent molar compressibility (Kφ,2), partial molar volume (), and partial molar compressibility () of aromatic hydrocarbons in DMSO at infinite dilution have been calculated from the experimental data. The variation of these parameters with the composition and temperature of the mixtures indicates that the interaction (DMSO–aromatic hydrocarbons) follows the order: benzene > toluene > p-xylene > m-xylene > o-xylene > mesitylene. The effect of the number and position of the methyl groups in these aromatic hydrocarbons on molecular interactions in these mixtures is also discussed. The VE values have also been calculated theoretically by using Flory’s statistical theory and the Prigogine–Flory–Patterson theory. The calculated VE values were found to be in good agreement with the experimental VE values for most of the mixtures.

Thermodynamics of mixtures containing a very strongly polar compound: IV – application of the DISQUAC, UNIFAC and ERAS models to DMSO+ organic solvent systems

Binary mixtures of dimethylsulfoxide (DMSO) with alkane, benzene, toluene 1-alkanol, or 1-alkyne have been investigated in terms of DISQUAC. The corresponding interaction parameters are reported. ERAS parameters for 1-alkanol + DMSO mixtures are also given. ERAS calculations were developed considering DMSO as a not self-associated compound. DISQUAC represents fairly well a complete set of thermodynamic properties: molar excess enthalpies, molar excess Gibbs energies, vapor–liquid equilibria, natural logarithms of activity coefficients at infinite dilution, or partial molar excess enthalpies at infinite dilution. DISQUAC improves UNIFAC calculations for H E . Both models yield similar results for VLE. In addition, DISQUAC also improves, ERAS results for 1-alkanol + DMSO mixtures. This may be due to ERAS cannot represent the strong dipole–dipole interactions present in such solutions.

Dielectric Study of Homogeneity in Some Binary Liquids in Their Supercooled State

In this work, we report a dielectric study of some binary mixtures in their supercooled region over a frequency range of 106 to 10−3 Hz. Differential scanning calorimetry measurements have been made above 100K. The samples studied here are DL-lactic acid (88% in aqueous solution), binary mixtures of dimethyl sulfoxide and acetic acid, of propylene glycol and cyclohexanol, and of 4-methyl-3-heptanol and tritolyl phosphate. The frequency dispersion of the relaxation spectra and the temperature dependence of the relaxation process have been critically examined for heterogeneity. The mixtures of dimethyl sulfoxide and acetic acid reveal a 1:1 complex formation. Some evidence of heterogeneity was found only in mixtures of 4-methyl-3-heptanol and tritolyl phosphate. For comparison, we have also studied liquid mixtures of isopropylbenzene with small quantities of acetone or fluorobenzene. These mixtures showed no signs of heterogeneity, although the relaxation spectra are broader than the spectrum of pure isopropylbenzene.

Static Dielectric Constant and Relaxation Time Measurements on Binary Mixtures of Dimethyl Sulfoxide with Ethanol, 2-Ethoxyethanol, and Propan-1-ol at 293, 303, 313, and 323 K

Time domain spectroscopy in reflection mode has been used to determine complex reflection coefficient for 2-ethoxyethanol−dimethyl sulfoxide (DMSO), ethanol−DMSO, and propan-1-ol−DMSO mixtures at 293, 303, 313, and 323 K, in the frequency range of 10 MHz to 10 GHz. Further Fourier transform and least-squares fit methods have been used to obtain the complex permittivity, static dielectric constant, and relaxation time.

The Measurements of the Surface Tension of Mixtures of Dimethyl Sulfoxide with Methyl, Ethyl and Propyl Alcohols

The surface tension of liquid binary mixtures of dimethyl sulfoxide (DMSO) with methyl (MeOH), ethyl (EtOH) and propyl (PrOH) alcohols was measured at 293.15 K, 298.15 K, 303.15 K, 308.15 K and 313.15 K. From all these data the temperature coefficients of surface tension, k'-(dγ12/dT), were calculated.

Volumetric, viscometric and ultrasonic behaviour of dimethyl sulfoxide with normal alcohols (C1C4) at 308.15 K

The density ( ), viscosity ( η ) and ultrasonic velocity (U) have been measured for the binary mixtures of dimethyl sulfoxide with methanol, ethanol, propan-l-ol and butan-l-ol over the entire range of mole fractions at a constant temperature of 308.15 K. Excess molar volume (VE), deviation in viscosity ( Δη ) and deviation in isentropic compressibility ( ΔKs) are calculated and related to intermolecular interactions.

Complexing ability of monensin anion for alkali metal cations in binary mixtures of dipolar aprotic solvents

AbstractCyclic voltammetric studies have been carried out on monensin anion complexes with the alkali metal cations in binary mixtures of dimethylsulfoxide with acetonitrile, acetone and hexamethylphosphoric triamide. respectively. The log Ks values obtained for the complexity constants can be well described by empirical relation log Ks = αDN + β, where DN stands for the effective donor number of a given solvent mixture and α and β mark the regression coefficients. This result is in agreement with the predominant role of cation solvation. The complexes show a sharp stability maximum for the Na+ complex in all media under investigation.

Physicochemical Properties and Internal Structures of Dimethyl Sulfoxide-1-Propanol Liquid Mixtures

Abstract The 1H-NMR spectra of liquid binary mixtures of dimethyl sulfoxide (DMSO) and 1-propanol (PrOH), were recorded at 298 K over almost the whole range of the mixed solvent compositions. From these data were found the values of the spectral parameter, Δδ(DMSO-PrOH). The densities (d 12) and viscosities (η12) of the mixed solvent were measured at 298.15 K, as well as the relative permittivities (∊12) at 293.15 K, 298.15 K and 303.15 K. From all these data, the molar volumes (V12) and their deviations from ideality were calculated. Additionally, the temperature coefficients of relative permittivity, α12, were found. These structural parameters of functions of concentration suggest the formation of stable DMSO-PrOH, DMSO-2PrOH and DMSO-3PrOH type complexes.

Solute-solvent and solvent-solvent interactions in binary solvent mixtures. 2. Effect of temperature on theET(30) polarity parameter of dipolar hydrogen bond acceptor-hydrogen bond donor mixtures

The effect of temperature on the Dimroth-Reichardt ET(30) parameter of binary mixtures of dimethyl sulfoxide, acetonitrile and nitromethane with alcohols and water was studied. The ET(30) polarity parameter of many of these binary mixtures exhibits a strong synergism. Dimethyl sulfoxide, acetonitrile and nitromethane form hydrogen-bonded complexes with the alcohols more polar than themselves. The ET(30) values of the mixtures were fitted according to an earlier model, based on solvent exchange equilibria, that allows calculation of the ET(30) values of the hydrogen-bonded complexes. The variation of the ET(30) values of the pure solvents and the hydrogen-bonded complexed solvents with temperature shows that the synergism decreases as the temperature increases.

Density and Viscosity of Mixtures of Dimethyl Sulfoxide + Methanol, +Ethanol, +Propan-1-ol, +Propan-2-ol, +Butan-1-ol, +2-Methylpropan-1-ol, and +2-Methylpropan-2-ol at 298.15 K and 303.15 K

Densities and viscosities have been measured for the binary mixtures of dimethyl sulfoxide + methanol, +ethanol, +propan-1-ol, +propan-2-ol, +butan-1-ol, +2-methylpropan-1-ol, and +2-methylpropan-2-ol at 298.15 K and 303.15 K. From these results, the excess molar volume (VE) and deviation in viscosity (Δη) have been computed. These properties are used to calculate regression coefficients of the Redlich−Kister equation.

Physicochemical properties of dimethyl sulfoxide–methanol liquid mixtures. Experimental and semiempirical quantum chemical studies

The 1H NMR spectra of liquid binary mixtures of dimethyl sulfoxide (DMSO) and methanol (MeOH), were recorded at 298 K over almost the whole range of the mixed solvent compositions. From these data were found the values of the spectral parameter, Δδ(DMSO–MeOH). The densities (d12) and viscosities (η12) of the mixed solvent were measured at 298.15 K, as well as the relative permittivities (ε12) at 293.15, 298.15, 303.15 and 308.15 K. From all these data, the molar volumes (V12) and their deviations from ideality were calculated. Additionally, the temperature coefficients of relative permittivity, α12, were found. These structural parameters of functions of concentration suggest the formation of stable DMSO–MeOH and DMSO–2 MeOH type complexes. The semiempirical quantum chemical (MOPAC package) method was applied to optimize the geometry, energy and hydrogen-bond lengths of dimers and trimers formed by molecules of dimethyl sulfoxide and methanol, and these conclusions wholly support the conclusions drawn from the physicochemical studies.

Donor Numbers for Binary Mixtures of Dimethyl Sulfoxide with Dipolar Aprotic Solvents

Solvent effect on the visible absorption spectrum of (acetylacetonato)(N,N,N',N'-tetramethylethylene-diamine)copper(II) was applied to estimate DN, the donor numbers of the binary mixtures of dimethyl sulfoxide with a series of other dipolar aprotic solvents. It was found that resulting DN values may be treated as explanatory parameters in the description of the mixed solvent effect on the stability constants of complexes formed by some macrocyclic ligands with univalent cations.

Temperature dependence of molar excess volumes for the dimethyl sulfoxide + thiophene system and thermal expansion coefficients between 293.15 and 313.15 K

Densities were measured with a vibrating-tube densimeter for binary mixtures of dimethyl sulfoxide + thiophene at temperatures from 293.15 to 313.15 K as a function of composition. Molar excess volumes V[sup E] for the mixtures, determined from the density data, are negative and become more negative with an increase in temperature. The coefficients of thermal expansion were also evaluated from the temperature dependence of the density.

Thermodynamic interactions in binary mixtures of dimethyl sulfoxide with benzene, toluene, 1,3-dimethylbenzene, 1,3,5-trimethylbenzene, and methoxybenzene from 298.15 to 308.15 K

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamic interactions in binary mixtures of dimethyl sulfoxide with benzene, toluene, 1,3-dimethylbenzene, 1,3,5-trimethylbenzene, and methoxybenzene from 298.15 to 308.15 KMrityunjaya I. Aralaguppi, Tejraj M. Aminabhavi, Shivaputrappa B. Harogoppad, and Ramachandra H. BalundgiCite this: J. Chem. Eng. Data 1992, 37, 3, 298–303Publication Date (Print):July 1, 1992Publication History Published online1 May 2002Published inissue 1 July 1992https://doi.org/10.1021/je00007a006RIGHTS & PERMISSIONSArticle Views359Altmetric-Citations79LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (577 KB) Get e-Alerts Get e-Alerts

Volumes and Heat Capacities of Dimethylsulfoxide, Acetone, and Acetamide in Water and of some Electrolytes in these Mixed Aqueous Solvents

The densities and volumetric specific heats of binary mixtures of dimethylsulfoxide (DMSO), acetone (ACT), and acetamide (ACM) in water were measured at 25 °C with a flow densimeter and a flow microcalorimeter. The same properties were also determined for ternary mixtures of 0.1 m LiCl, NaCl, Me4NBr, and Bu4NBr in ACT–water and DMSO–water mixtures, and volumes for 0.1 m Bu4NBr in ACM–water and urea–water mixtures. The derived apparent molal volumes and heat capacities of nonelectrolytes in water and the transfer functions of the electrolytes from water to the mixed solvents suggest that, contrary to urea, the present non-electrolytes are slightly hydrophobic but, with the possible exception of ACT, their overall influence on water structure has practically no influence on the various solute–solute interactions.

Ultrasound propagation in binary mixtures of dimethyl sulfoxide and water

Ultrasound propagation in binary mixtures of dimethyl sulfoxide and water