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

Abstract

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.

Density, Viscosity and Ultrasonic Speed Based Acoustical Studies of Structural Properties of 1,1’-Bis(4-Amino Phenyl) Cyclohexane Symmetric Double Schiff Bases in THF Solutions at 303.15, 308.15 and 313.15K

“…The density (ρ) measurements were performed for different solutions at 303.15, 308.15 and 313.15K0.1K with the help of specific gravity bottle. The estimated errors in density measurements were found to be 0.1 kg/m 3 as reported in our earlier work [15,16]. Viscosity (η) and ultrasonic speed (U) of Schiff bases solutions (SDSB-1 to 3) were measured with an Ubbelohde suspended level viscometer and Mittal Enterprise Interferometer (New Delhi) Model No F-81, operating at 2 MHz at 303.15, 308.15 and 313.15K 0.1K respectively.…”

“…The ultrasonic velocity and viscosity measurements have proved important for studying molecular and structural properties of liquid solution [14]. Therefore by measuring density of liquid and its ultrasonic velocity many acoustical parameters can be determined [15]. Acoustical parameters provide information about molecular interactions, the nature and strength of interactions, solute-solute and solute-solvent interactions in pure solvents and theirs solutions [16][17].…”

“…Therefore by measuring density of liquid and its ultrasonic velocity many acoustical parameters can be determined [15]. Acoustical parameters provide information about molecular interactions, the nature and strength of interactions, solute-solute and solute-solvent interactions in pure solvents and theirs solutions [16][17]. Drug action is affected by various kinds of physico-chemical interactions e.g.…”

“…ILCPA Volume 53 viscous relaxation time (τ), classical absorption coefficient (α/f 2 ) Cl and solvation number (S n ) of Schiff bases solutions were derived according to our previous work [15,22] and are reported in Table 2. All these parameters were correlated with concentration(C) of Schiff bases at different temperatures (T).…”

Synthesis, Characterization and Evaluation of Antimicrobial Activity of Few New Heterocyclic Compounds Derived from Nicotinic Acid

“…26 Schiff bases are significant kind of the most widely used organic compounds and possess many applications such as biological, inorganic chemistry, analytical, medicinal and as fine chemicals. 27 The important and interesting roles of schiff bases are as intermediates in the biologically important transmutation reactions. In schiff bases, the C=N bond is main for molecular interactions, as some schiff bases have been reported to possess anticancer, antimalarial, antibacterial, and antifungal activity.…”