...Halon 1301 used is a gaseous extinguishing agent. It works by being heavy and inert: it sits around and prevents oxygen from reaching the fire while absorbing the heat. Very little of it should chemically react.
I'm not a chemist but I was under the impression that the exact opposite was the case: the whole effectiveness of halon-like suppressants comes from their ability to interfere with combustion processes at the atomic level, once broken down by heat. The cooling/smothering effects are welcome but secondary...
See:
SKYbrary - Halon Fire Extinguishers