Study of Density,Viscosity and Ultrasonic properties of Ethyl/methyl-4-(aryl)-6-methyl-2-oxo/thioxo-1, 2, 3, 4-tetrahydropyridimidine-5-carboxylate

• Main Authors: Sonal Dilip Bajaj, Pradip V. Tekade
• Format: Article
• Language: English
• Published: Universidade Federal de Mato Grosso do Sul 2015-01-01
• Series: Orbital: The Electronic Journal of Chemistry
• Subjects: density, viscosity, ultrasonic velocity, acoustical properties, molecular interactions.
• Online Access: http://orbital.ufms.br/index.php/Chemistry/article/view/586
• ISSN: 1984-6428

<p>Density (ρ) and viscosity (η) and Ultrasonic velocity (v) of some substituted pyrimidines viz. Ethyl 4-(4-chlorophenyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate,Ethyl-4-(4-chlorophenyl)-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate , Ethyl 4-(furan-2-ylmethyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate , Ethyl 4-(furan-2-ylmethyl)-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate , Ethyl 4-(2-hydroxyphenyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate have been measured in ethanolic solution of  different concentrations(0.1%,0.05%,0.025%,0.0125%,1.0%,0.5%,0.25%,0.125%).</p> <p>Various acoustical parameters such as adiabatic compressibility(β_ad),intermolecular free length(L_f) , relaxation time (Ʈ)),free volume (V_f),internal pressure (Π_i),acoustic impedance (Z), surface tension(S), attenuation(a/f²),Rao’s constant(R),molar volume(Vm), cohessive energy(CE) of these solutions were computed from the experimental  velocity, viscosity and density measurements. The changes in the acoustical properties nave been used to interpret various molecular interactions in these solutions. Solute solvent interaction seems to be significant in system studied.<strong></strong></p>