>>545205479
Probably some sort of chlorofluorocarbon (the thing that destroys the ozone layer and was used in freezers and AC units), would fit it's use in cooling (IRL quantum computers operate at cryogenic temperatures).
Dunno why they appended the "ketone" part as I can't find any CFC with a ketone group´, but the simplest one would look like pic rel, an oxygen group to a carbon that's bond to other carbons and at least one fluorine atom somewhere.