Ultrasonic investigation of molecular association in ternary mixtures

✍ Scribed by A. Awasthi; M. Rastogi; M. Gupta; J.P. Shukla

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 478 KB
• Volume: 80
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/s0167-7322(99)00016-1

✦ Synopsis

Complex formation in ternary mixtures of amides viz. acetamide and benzamide with ethanol in benzene has been studied through ultrasonic velocity measurements (at 1 MHz) in the concentration range of 0.02-0.09 at varying temperature of 30, 40 and 50°C. Using the measured ultrasonic velocity, adiabatic compressibility, intermolecular free length, molar sound velocity and molar compressibility have been evaluated. These in turn are used to study the solute-solute interactions in these systems. The ultrasonic velocity shows a maxima and adiabatic compressibility a corresponding minima as a function of concentration for these mixtures. The results indicate the possibility of complex formation between unlike molecules through hydrogen bonding between the hydrogen atom of ethanol molecule and the oxygen atom of amide molecule. Other parameters have also exhibited non-linear behaviour which is an indication of complex formation in the mixture. The results obtained using infrared spectroscopy forboththe systems also supports the existence of complex formation through intermolecular hydrogen bonding.