Topological and thermodynamic investigations of molecular interactions of aniline and o-toluidine with chloroform

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• 作者：Dimple Sharma ; J.S. Yadav ; Satish Kumar ; K.C. Singh ; V.K. Sharma
• 关键词：Molar excess enthalpies ; H^E ; Molar excess volumes ; V^E ; Isentropic compressibility changes of mixing ; Thermochimica Acta
• 出版年：2008
• 期刊代码：110_00406031
• 类别：ch
• 出版时间：30 May 2008
• 卷：471
• 期：1-2
• 页码：74-79
• 文件大小：406 K

摘要

Molar excess volumes, V^E, molar excess enthalpies, H^E, and speeds of sound data, u, of chloroform (i) + aniline or o-toluidine (j) binary mixtures have been measured as a function of composition at 308.15 K. Isentropic compressibility changes of mixing, have been determined by employing speed of sound data. Topological investigations of V^E data reveals that aniline, chloroform and o-toluidine are associated entities and these (i + j) mixtures contain a 1:1 molecular complex. The IR studies lend further support to the nature and extent of interaction for the proposed molecular entity in the mixtures. H^E and values have also been calculated by employing Moelwyn-Huggins concept [Polymer 12 (1971) 387] taking topology of the constituents of the mixtures. It has been observed that calculated H^E and values compare well with their corresponding experimental values. The observed V^E, H^E and data have also been analyzed in terms of Flory theory.