Topological investigations of molecular interactions of binary and ternary mixtures containing tetrahydropyran, o-toluidine and N-methylformamide

摘要

The densities ρ, speed of sound u, data of o-toluidine (i) + tetrahydropyran (j) + N-methylformamide (k) and its sub-binary o-toluidine (i) + tetrahydropyran (j); tetrahydropyran (j) + N-methylformamide (k); o-toluidine (i) + N-methylformamide (k) mixtures have been measured over entire mole fraction at 298.15, 303.15 and 308.15 K. The excess molar enthalpies, H ~E data of o-toluidine (i) + N-methylformamide (k); tetrahydropyran (j) + N-methylformamide (k) binary mixtures have also been measured as a function of composition at 308.15 K. The densities and speeds of sound of binary and ternary mixtures have been utilized to determine their excess molar volumes, V~E and excess isentropic compressibilities, κSE. The topology of the constituents (Graph theory) has been employed to determine V~E, H~E and κSE data of binary as well as ternary mixtures. It has been observed that the estimated excess properties compare well with their corresponding experimented values.