Acoustical Studies on Binary Liquid Mixtures of Some 1,3,4-Oxadiazole Derivatives with Acetone at 303.15 K

The wide spread use of 1,3,4-oxadiazoles as a scaffold in medicinal chemistry establishes this moiety as an important bioactive class of heterocycles. In the present study ultrasonic velocity (u), density (ρ) and viscosity (η) have been measured at frequency 2 MHz in the binary mixtures of 1,3,4-oxadiazole derivatives in acetone at 303.15 K using ultrasonic interferometer technique. The measured value of ultrasonic velocity, density and viscosity have been used to estimate the acoustical parameters namely adiabatic compressibility (βad), relaxation time (τ), acoustic impedance (Zi), free length (Lf), free volume (Vf) and internal pressure (πi), with a view to investigate the nature and strength of molecular interactions. The obtained result support the occurrence of molecular association through hydrogen bonding in the binary liquid mixtures.

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Ultrasonic Studies of Molecular Interactions in Organic Binary Liquid Mixtures

E-Journal of Chemistry ◽

10.1155/2010/137943 ◽

2010 ◽

Vol 7 (s1) ◽

pp. S217-S222

Author(s):

S. Thirumaran ◽

T. Alli ◽

D. Priya ◽

A. Selvi

Keyword(s):

Experimental Data ◽

Hydrogen Bonding ◽

Internal Pressure ◽

Ultrasonic Velocity ◽

Molecular Interactions ◽

Molecular Interaction ◽

Adiabatic Compressibility ◽

Liquid Mixtures ◽

Acoustical Parameters ◽

Binary Liquid

The ultrasonic velocity, density and viscosity have been measured for the mixtures of 1-alkanols such as 1-propanol and 1-butanol withN-Ndimethylformamide (DMF) at 303 K. The experimental data have been used to calculate the acoustical parameters namely adiabatic compressibility (β), free length (Lf), free volume (Vf) and internal pressure (πi). The excess values of the above parameters are also evaluated and discussed in the light of molecular interaction existing in the mixtures. It is obvious that there is a formation of hydrogen bonding between DMF and 1-alkanols. Further, the addition of DMF causes dissociation of hydrogen bonded structure of 1-alkanols. The evaluated excess values confirm that the molecular association is more pronounced in system-II comparing to the system-I.

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Acoustical Studies on Molecular Interactions in Binary Liquid Mixtures at 303 K

E-Journal of Chemistry ◽

10.1155/2009/329818 ◽

2009 ◽

Vol 6 (4) ◽

pp. 1150-1152 ◽

Cited By ~ 3

Author(s):

R. Uvarani ◽

J. Sivapragasam

Keyword(s):

Ultrasonic Velocity ◽

Molecular Interactions ◽

Molecular Interaction ◽

Binary Systems ◽

Liquid Mixtures ◽

Binary Liquid Mixtures ◽

Ultrasonic Technique ◽

Acoustical Parameters ◽

Binary Liquid ◽

Excess Parameters

Molecular interaction studies using ultrasonic technique in the binary liquid mixtures of cyclohexanone witho-cresol andp-cresol have been carried out at 303 K. Using the measured values of ultrasonic velocity, density and viscosity, acoustical parameters and their excess values are evaluated. From the properties of these excess parameters the nature and strength of the interactions in these binary systems are discussed.

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Ultrasonic Study of Molecular Interaction in Binary Liquid Mixtures of n-Hexane with Alcohols

International Letters of Chemistry Physics and Astronomy ◽

10.18052/www.scipress.com/ilcpa.5.59 ◽

2013 ◽

Vol 5 ◽

pp. 59-71 ◽

Cited By ~ 3

Author(s):

N. Santhi ◽

P.L. Sabarathinam ◽

G. Alamelumangai ◽

J. Madhumitha ◽

M. Emayavaramban

Keyword(s):

Experimental Data ◽

Molar Volume ◽

Ultrasonic Velocity ◽

Molecular Interactions ◽

Molecular Interaction ◽

Adiabatic Compressibility ◽

Liquid Mixtures ◽

Acoustical Parameters ◽

Binary Liquid ◽

Intermolecular Free Length

Ultrasonic velocity, viscosity and density of alcohol[s] in n-hexane have been measured at various temperatures in the range of 303.15 - 318.15K. From the experimental data, the acoustical parameters such as molar volume, adiabatic compressibility, intermolecular free length and their excess values have been computed and presented as functions of compositions. The deviations from ideality of the acoustical parameters are explained on the basis of molecular interactions between the components of the mixtures. The variations of these parameters with composition of the mixture suggest the strength of interactions in these mixtures.

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Acoustical Studies on Molecular Interaction of 1,3,4-Pyrazoline Derivatives Using Ultrasonic Technique at 303.15 K

International Letters of Chemistry Physics and Astronomy ◽

10.18052/www.scipress.com/ilcpa.39.100 ◽

2014 ◽

Vol 39 ◽

pp. 100-115

Author(s):

A. Raguraman ◽

N. Santhi

Keyword(s):

Relaxation Time ◽

Molecular Interactions ◽

Acoustic Impedance ◽

Molecular Interaction ◽

Adiabatic Compressibility ◽

Liquid Mixtures ◽

Ultrasonic Technique ◽

Acoustical Parameters ◽

Binary Liquid ◽

Rao’S Constant

The acoustical parameters for the binary liquid mixtures containing Pyrazoline derivatives in DMF have been estimated at 303.15 K, from the measured values of ultrasonic velocity (U), density (ρ) and viscosity (η). From these data some of acoustical parameters such as adiabatic compressibility (β), free length (Lf), acoustic impedance (Z), Rao’s constant (R), molar compressibility (W), relaxation time (τ), free volume (Vf) and internal pressure (πi), etc., have been computed using the standard relations. The results have been discussed in terms of molecular interactions.

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