Abstract
Excess molar enthalpies, H E data of { o-toluidine ( i) + pyridine or α-, β-, or γ-picoline ( j)} binary mixtures at a temperature of 308.15 K; densities, ρ speeds of sound, u of the same mixtures at a temperature of (298.15, 303.15, and 308.15) K have been measured over entire mole fraction range. The measured densities and speeds of sound data have been utilized to determine excess molar volumes, V E and excess isentropic compressibilities, κ s E of the investigated mixtures. The V E , H E , and κ S E data of the studied mixtures have been analyzed in term of (i) Graph theory and (ii) Prigogine–Flory–Patterson theory. Analysis of V E data in terms of Graph theory suggest that ( i + j) mixtures are characterized by interaction between nitrogen and carbon atoms of pyridine or substituted pyridine (α-, β-, or γ-picoline) with hydrogen atom and π-electron cloud of aromatic ring of o-toluidine to form i; j molecular complex. The IR studies lend additional support to the proposed molecular entities in ( i + j) mixtures. It has been observed that V E, H E , and κ S E values predicted by Graph theory compare well with their corresponding experimental values.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call