Enthalpy of Formation and C−F Bond Enthalpy of Fluorofullerene C60F36

摘要: The standard molar enthalpy of combustion fluorofullerene C60F36 was determined by rotating-bomb calorimetry, ΔcH°m = −24692 ± 199 kJ·mol-1. Using this result and the sublimation, ΔsubH°m 139 8 kJ·mol-1, values enthalpies formation in crystalline gaseous states were found to be −5362 201 kJ·mol-1and −5223 respectively. reaction C60F36(g) C60(g) + 36F(g) calculated, ΔrH°m(298.15 K) (10617 202) or 294.9 5.6 kJ·mol-1 per one C−F bond. comparison with C60F48 48F(g), 287.5 3.5 bond leads a preliminary conclusion that decreases amount F atoms attached fullerene cage.