Volumetric Behavior of Binary Mixtures of Alkoxyethanols and Some Selected Amines at 298.15 K

Abstract

Densities of binary mixtures of 2-methoxyethanol (2-MeO-EtOH) and 2-ethoxyethanol (2-EtO-EtOH) with hexylamine (HLA), diethylamine (DEA), triethylamine (TEA), tert-butylamine (TBA), aniline (ANL), and benzylamine (BLA) have been determined at varying compositions of the alkoxyalkanols at 298.15 K. The excess molar volumes, VE, of the binary mixtures were calculated from the experimental density data of the mixtures and the component single solvents. The calculated excess molar volumes were fitted into the Redlich-Kister polynomial to obtain the fitting coefficients and standard deviations. The excess molar volumes of the binary mixtures of all the solvent systems investigated were negative over the entire range of the solvents composition. The negative values were attributed to stronger hydrogen bond formations between the unlike molecules of mixtures than those between the like molecules of the pure components. The magnitude of the excess molar volumes of the binary mixtures of 2-methoxyethanol and the aliphatic amines were in the order TBA > TEA > DEA > HEA. For the two aromatic amines, the magnitudes were in the order BLA > ANL. For binary mixtures of the amines and 2-ethoxyethanol, the magnitudes were in the order DEA > TEA > TBA > HEA at compositions where the mole fraction of 2-EtO-EtOH was ≤0.5 and TBA > TEA > DEA > HEA above 0.5 mole fraction of 2-EtO-EtOH.

Solutions of Urea in tert-Butylamine: The Phenomenon of “Partial Molar Isobaric Compaction of the Solute” According to Density Measurements between 278.15 and 303.15 K at Ambient Pressure

“…Apart from the aforementioned work by Kipkemboi and Easteal, there is also the results consisting from four ρ 1 ○ ( T ) values over the temperature range from T = 288.15 to 303.15 K reported by Tôrres and Hoga . In addition, we found a few of other papers, which provide the density data for liquid t -BuNH 2 at several (one to three) temperatures over the range from T = 293.15 to 303.15 K. ,− Meanwhile, if the data ,,, are in overall comparable to those we obtained here, then the results ,, look quite different from ours (Figure ). So, the difference in ρ 1 ○ is about 4 kg·m –3 at T = 298.15 K and it even increases reaching T = 303.15 K (Table ).…”

“… a Standard uncertainties u c are u c ( T ) = 0.01 K and u c ( p ) = 1 kPa. b U c (ρ 1 ○ ) = 0.03 kg·m –3 . c Reference (Kipkemboi and Easteal). d Reference (Tôrres and Hoga). e Reference (Saleh et al). f Reference (Kinart et al). g Reference (Reddy et al). h Reference (Narasaiah et al). i Reference (Pradhan). j Reference (Kemeakegha et al). …”

“…Relative deviations of literature data on the density of t -BuNH 2 from ours (the dotted datum line) at different temperatures. The sources are designated as following: ref , closed rhombuses; ref , closed triangles-to-down; ref , closed circles; ref , closed squares; ref , open stars; ref , closed triangles-to-right; ref , closed triangle-to-up; ref , open triangle-to-left. The combined expanded uncertainties (a confidence level is 0.95) for the density values are given in Table .…”

Studies on Ultrasonic and Spectroscopic Properties of Binary Liquid Mixture of Ethyl Oleate with Aniline at Different Temperatures

“…Figure 15 represents the hydrogen bonding formed in the mixture. The negative excess molar volume (V m E ) 12 and positive excess viscosity (∆η) represent the strong interaction between the unlike molecules of the binary mixture, like dipole-dipole hydrogen bonding. Though the excess adiabatic compressibility (∆β ad ) values here are positive the magnitudes are low.…”

Volumetric Behaviour of Binary Mixtures of Diethyl Ether + (C1 – C4) Alkoxyethanols at Different Temperatures

“…DEE has also found broad applications in medicine and pharmacy due to its anesthetic effect, with the advantage of having a relatively wide gap between therapeutic and toxic doses, compared to chloroform (Bovil, 2008) 4 . The applications of 2alkoxyethanols have been reported elsewhere (Jumbo et al, 2019) 1 and (Kemeakegha et al, 2015) 5 .…”