Ultrasonic studies on interionic interactions of some alkali metal halides in aqueous d-glucose solution at varying molalities and temperatures

The  present experimental investigation was carried out in order to explore the possible molecular interionic interactions of alkali metal halides namely, sodium chloride, potassium chloride, potassium bromide and potassium iodide in aqueous D-glucose solution at 303.15, 308.15K and 313.15 K. Experimental values of density (ρ), viscosity (η) and ultrasonic velocities (U) were carried out on the liquid ternary mixtures of water +D-glucose + alkali metal halides The binary solvent mixture of water + D-glucose was prepared under molality(m) basis say, at two fixed   molalities (0.2 and 0.4mol.kg-1). Alkali metal halides (NaCl, KCl, KBr and KI) were added under different molalities with these binary solvent mixtures. The related and relevant parameters correlated to our present study such as adiabatic compressibility (b), molal hydration number (nH), apparent molal compressibility (jk), apparent molal volume (jv), limiting apparent molal compressibility ( ), limiting apparent molal volume ( ) and their associated constants (SK, SV), partial transfer volume (∆ ) from water to aqueous solution were determined. In order to stress more on the viscometric data to substantiate its importance, the viscosity B-coefficient has been meticulously evaluated, The present investigation has exploited the possible molecular associations such as ion-ion, ion-solvent, solute-solvent, solute-solute etc., which are identified and eventually discussed about the behaviour of solutes (alkali metal halides) in the solvent mixture

Ultrasonic studies on interionic interactions of some alkali metal halides in aqueous d-glucose solution at varying molalities and temperatures

The present experimental investigation was carried out in order to explore the possible molecular interionic interactions of alkali metal halides namely, sodium chloride, potassium chloride, potassium bromide and potassium iodide in aqueous D-glucose solution at 303.15, 308.15K and 313.15 K. Experimental values of density (ρ), viscosity (η) and ultrasonic velocities (U) were carried out on the liquid ternary mixtures of water +D-glucose + alkali metal halides The binary solvent mixture of water + D-glucose was prepared under molality(m) basis say, at two fixed   molalities (0.2 and 0.4mol.kg-1). Alkali metal halides (NaCl, KCl, KBr and KI) were added under different molalities with these binary solvent mixtures. The related and relevant parameters correlated to our present study such as adiabatic compressibility (b), molal hydration number (nH), apparent molal compressibility (jk), apparent molal volume (jv), limiting apparent molal compressibility ( ), limiting apparent molal volume ( ) and their associated constants (SK, SV), partial transfer volume (∆ ) from water to aqueous solution were determined. In order to stress more on the viscometric data to substantiate its importance, the viscosity B-coefficient has been meticulously evaluated, The present investigation has exploited the possible molecular associations such as ion-ion, ion-solvent, solute-solvent, solute-solute etc., which are identified and eventually discussed about the behaviour of solutes (alkali metal halides) in the solvent mixture.&nbsp

Volumetric and Ultrasonic Studies on Interionic Interactions of some Amino Acids in Aqueous Magnesium Acetate Medium at 306.15K

The experimental measurements of density (r), viscosity (h) and Ultrasonic velocity (U)  have been carried out on the amino acids,  namely,  L-valine, L-lysine and L-histidine which have been mixed with various molar concentrations in aqueous magnesium acetate solution in different molarities (0M, 0.4M & 0.8M) at a temperature of 306.15K. Using these experimental values, the acoustical parameters such as adiabatic compressibility (b), molar hydration number (nH), apparent molar compressibility (jK), apparent molar volume (jV), limiting apparent molar compressibility ( ), limiting apparent molar volume ( ) and the constants (SK, SV) at infinite dilution were evaluated. Transfer Volume (∆ ) at infinite dilution from water to aqueous magnesium acetate solutions has been determined. In addition, Viscosity  A  and B coefficients of Jone-Dole equation have also been evaluated from viscosity measurements. Eventually, these parameters have been critically analyzed and emphasizing  the possible interionic interactions such as ion-ion, solute-solvent, ion-solvent, solute-co-solute etc., and  discussed in terms of structure-making and structure-breaking effects of the amino acids in the solvent mixture

Bis(μ-N-benzyl-N-furfuryldithio­carbamato)-1:2κ3 S,S′:S′;2:1κ3 S,S′:S′-bis­[(N-benzyl-N-furfuryldithio­carbamato-κ2 S,S′)cadmium]

In the centrosymmetric title compound, [Cd2(C13H12NOS2)4], pairs of dithio­carbamate ligands exhibit different structural functions. Each of the terminal ligands is bidentately coordinated to one CdII atom and forms a planar four-membered CS2Cd chelate ring, whereas pairs of the tridentate bridging ligands link two neighbouring CdII atoms, forming extended eight-membered C2S4Cd2 tricyclic units whose geometry can be approximated by a chair conformation. The coordination polyhedron of the CdII atoms is a distorted square-pyramid. The five-membered furan ring and the benzene ring are disordered over two sets of sites with an occupancy ratio of 0.62 (8):0.38 (8)

Acoustical Behaviour of Disaccharide (Sucrose) in Aqueous Alkali Metal Halides at Varying Temperatures

Abstract: Interionic interactions of ternary mixtures of sucrose in aqueous alkali metal halides namely, sodium chloride (NaCl), potassium chloride (KCl), potassium bromide (KBr) and potassium iodide (KI) at 303.15, 308.15 and 313.15K was studied in this paper. For this, binary solvent mixture (water+ metal halides) was prepared at two molalities (m) (Say, at 0.0 m and 0.3 m). The related and relevant parameters correlated to the present study such as adiabatic compressibility (), apparent molal compressibility ( K ), apparent molal volume ( V ), limiting apparent molal compressibility

(1,2,3,4-Tetra­hydro­isoquinoline-2-carbo­dithio­ato-κ2 S,S′)(thio­cyanato-κN)(tri­phenyl­phosphane)nickel(II)

The NiII atom in the mononuclear title compound, [Ni(C10H10NS2)(NCS)(C18H15P)], exists within a S2PN donor set that defines a distorted square-planar geometry. A significant asymmetry in the Ni—S bond lengths support the less effective trans effect of SCN− over PPh3

cis-Bis(4-methyl­piperazine-1-carbo­dithio­ato-κ2 S,S′)bis­(pyridine-κN)cadmium

In the title complex, [Cd(C6H11N2S2)2(C5H5N)2], the CdII ion is hexa­coordinated by two N atoms from two pyridine ligands and by four S atoms from two dithio­carbamate ligands in a distorted octa­hedral geometry. The CdII ion lies on a twofold axis. The piperazine ring is in chair conformation and its least-squares plane makes a dihedral angle of 81.4 (1)° with that of the pyridine ring

Why Are Saccharides Dehydrated in the Presence of Electrolytes? Insights from Molecular Modeling and Thermodynamic Measurements

The mechanisms governing the interactions of neutral polar solutes with ions in aqueous solutions are still poorly understood, despite the importance of this phenomenon in many fields (chemistry, physicochemistry, biology, food industries). In order to go further through the understanding of the molecular mechanisms governing the ions’ specific effects, this paper presents a generic method dealing with the characterization and understanding of interactions between saccharides and ions in aqueous systems. For that, an original approach combining a computational technique and experimental measurements (thermodynamic properties) is proposed to explain and rationalize the relationship between the solute hydration and the physical chemistry of the ions in solution (cation/anion, charge, size, and hydration). These relationships make it possible to evaluate the hydration state of a saccharide, a polar neutral molecule, according to the ionic composition, from the knowledge of the ions’ hydration properties. This work proposes new insight into molecular mechanisms governing the polar neutral solute/ion interactions and a new understanding of the hydration phenomenon in electrolytic solutions