Solute–Solvent Interactions of Alkyl Acetoacetates in Aqueous {1-Butyl-3-methylimidazolium Chloride [bmim][Cl]} Ionic Liquid Solutions in the Temperature Interval (288.15–308.15) K

Abstract

The density, ρ, and speed of sound, u, of methyl acetoacetate and ethyl acetoacetate in aqueous 1-butyl-3-methylimidazolium chloride [bmim]­[Cl] solutions have been measured in the temperature interval T = (288.15, 293.15, 298.15, 303.15, and 308.15) K and atmospheric pressure. The data has been used to calculate apparent molar volumes (V ϕ) and apparent molar adiabatic compressibility (K ϕ,s) of these mixtures. The standard partial molar volumes (V ϕ 0), standard partial molar volumes of transfer (ΔV ϕ 0), standard partial molar adiabatic compressibility (K ϕ,s 0), and standard partial molar adiabatic compressibility (ΔK ϕ,s 0) of transfer have been determined from these density and speed of sound data. The results have been interpreted in terms of solute–solvent interactions. Later, the temperature dependence of the apparent molar volume has been used to calculate apparent molar expansivity ϕE 0 and the Hepler’s constant values, (∂2 V ϕ 0/∂T 2) to support the conclusions obtained from volumetric and speed of sound properties.

Interaction studies of methyl acetate in aqueous solutions of quinoxaline derivatives: Effect of temperature and concentration

“…These plots also show that at a fixed temperature k φ values decreases with an increase in concentration of the solute for all the systems. The k φ values are positive for all the systems which indicate that methyl acetate rich region is more compressible as compared with bulk solution [43]. The positive k φ values are attributed to the weak interactions between the solute and solvent.…”

“…The system (methyl acetate + water) measured by Pal et al [43] was used to calculate the partial molar volumes of transfer ΔV φ 0 and partial molar adiabatic compressibility of transfer Δk φ 0 from water to aqueous solutions of quinoxaline derivatives at studied temperatures. A perusal of …”

Densities and Speeds of Sound of Glycine, l-Alanine, and l-Valine in Aqueous 1-Ethyl-3-methylimidazolium Chloride Solutions at Different Temperatures

“…The ionic liquid [emim]­[Cl] was checked for any impurities by 1 H NMR (Bruker 300 MHz) and IR (ABB MB3000). All other details describing preparation of solutions have been given in our earlier studies. − Details of the chemicals used in the present study are also given in Table .…”

“…Various volumetric and compressibility parameters have been calculated to understand the influence of a series of amino acids upon ILs adequately. Some mixtures comprising ionic liquid and amino acid have also been studied successfully as reported in the literature. − In a previous work, we have reported the densities and speeds of sound of aqueous mixtures comprising ionic liquid and ester − and amino acids to interpret the interaction behavior based on the structural characteristics of properties of the species involved. In the current study, an effort has been made to elucidate preferential interactions prevailing among amino acids and aqueous 1-ethyl-3-methyl imidazolium chloride [emim]­[Cl] mixtures.…”

Solute–solvent interactions of glycine, l -alanine, and l -valine in aqueous 1-methyl imidazolium chloride ionic liquid solutions in the temperature interval (288.15 to 308.15) K

“…The solvation behavior of amino acids can be accessed by studying the solubility data of ILs and salt mixtures. In previous work, we have studied the density and speed of sound of (IL + water + ester) [25][26][27][28] and (IL + water + amino acid) [29,30] mixtures to understand their mutual interaction behavior. Now, an attempt has been made to understand intermolecular interactions among 1-methyl imidazolium chloride and amino acids.…”