4-Fluorotoluene: Chemical Thermodynamic Properties, Vibrational Assignment, and Internal Rotation

Abstract
Thermodynamic data were obtained for 4‐fluorotoluene and correlated by methods of statistical mechanics to derive values of the chemical thermodynamic properties in the ideal‐gas state from 0° to 1500°K. A vibrational assignment consistent with the calorimetric data was obtained. Internal rotation was shown to be essentially free. Experimental studies provided the following information: values of heat capacity for the solid (13°K to the triple point), the liquid (triple point to 361°K), and the vapor (377° to 500°K); the triple‐point temperature; the heat of fusion; thermodynamic functions for the solid and liquid (0° to 390°K); heat of vaporization (347° to 390°K); parameters of the equation of state; and vapor pressure (341° to 428°K).