Acoustical Studies of Some Schiff Bases in 1,4‐Dioxane and Dimethylformamide at 318.15 K

SummaryDensity, ultrasonic velocity and viscosity of some vanillin Schiff bases derivatives have been studied in methanol and tetrahydrofuran (THF) at 308.15 K. From the experimental data, various acoustical parameters such as isentropic compressibility (κ s ), Rao's molar sound function (R m ), Van der Waals constant (b), relaxation strength (r), intermolecular free length (L f ), apparent molar compressibility, etc. have been evaluated, which helps in understanding the molecular interactions occurring in these solutions.Keywords: Vanillin Schiff bases, ultrasonic Study, acoustical parameters, methanol, THF. ResumenBases de Schiff de vainillina: interacciones intermoleculares en soluciones de metanol y THF En este trabajo se estudiaron la densidad, la velocidad ultrasónica y la viscosidad de soluciones de algunas bases de Schiff derivadas de la vainillina en metanol y tetrahidrofurano (THF) a 308,15 K. A partir de los datos experimentales, se evaluaron diversos parámetros acústicos, como la compresibilidad isentrópica (κ s ), la función acústica molar de Rao (R m ), la constante de Van der Waals (b), la fuerza de relajación (r), la longitud intermolecular libre (L f ), la compresibilidad molar aparente, etc., todo lo cual ayuda a comprender las interacciones moleculares que ocurren en estas soluciones.

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“…However, little work has been done for some organic compound solutions [18][19][20][21] especially Schiff bases [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Vanillin Schiff bases: Molecular interactions in methanol and THF solutions

Baluja

Javiya

2017

Rev. colomb. cienc. quim. farm.

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“…It is also found most suitable to investigate various organic compounds (liquids) and Schiff bases [13]. Ultrasonic studies in aqueous and non aqueous electrolytic solutions have lead to new insight into ion-solvent interactions and provide valuable information about the ionic interactions and the nature and the strength of interactions [14].Recently many investigators have reported the influence of solvent, concentration, temperature and the nature of the substituents on the structure of Schiff bases and molecular interactions in the solutions [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Speed, Density, Viscosity and Associated Acoustical Parameters of Chloroform Solutions of Symmetric Double Schiff Bases at 308.15K

Gangani

Parsania

2015

ILCPA

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The density, viscosity and ultrasonic speed (2MHz) of chloroform and symmetric double Schiff bases have been investigated at 308.15K. Various acoustical parameters such as specific acoustical impedance (Z), adiabatic compressibility (Кa), Rao’s molarsound function (Rm), Vander Waals constant (b), internal pressure (π), free volume (Vf), intermolecular free path length (Lf), classical absorption coefficient (α/f2)Cl) and viscous relaxation time (τ) were determined using ultrasonic speed (U), viscosity (η) and density (ρ) data of Schiff bases solutions and correlated with concentration. Increasing linear or nonlinear trends of (Z, Rm, b, τ and (α/f2)Cl) and decreasing trend of Кa, Lf,, π and Vf with increasing concentration of Schiff bases suggested presence of strong molecular interactions in the solutions and solvophilic nature of the Schiff bases, which is further supported by the positive values of solvation number. The nature and position of substituent also affected the strength of molecular interactions.

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Section: Introductionmentioning

confidence: 99%