Aromatic fluorocarbon mixtures I. Excess enthalpies of benzene + chloropentafluorobenzene, + bromopentafluorobenzene, and + iodopentafluorobenzene

摘要: The molar excess enthalpies of benzene + chloropentafluorobenzene, bromopenta-fluorobenzene, and iodopentafluorobenzene have been measured at 298.15 308.15 K. values for the equimolar mixtures K are −671, −772, −1080 J mol−1. heat capacity constant pressure is positive each three mixtures. cyclohexane pentafluorobenzene, bromopentafluorobenzene, x = 0.5 K; 1.52, 1.21, 1.13, 1.10 kJ results discussed in terms complex formation between unlike molecules aromatic hydrocarbon fluorocarbon systems. They appear to be consistent with recent thermodynamic non-thermodynamic studies from which it was concluded that charge-transfer plays no significant role any formation.