Abstract
In the absence of hydrogen fluoride, the fluorine exchange in sulphur tetrafluoride proceeds in the liquid state, in solution and in the gaseous state at almost the same rate. Evidently, in these cases, the reaction is intramolecular. The observed values for the activation energy of this exchange are found to lie in the range 11.2 ± 1.0 kcal mole -1 (liquid, solution) to 11.7 ± 1.5 kcal mole -1 (gaseous SF 4).
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