Xenon dibromide
Xenon dibromide is an unstable chemical compound with the chemical formula XeBr2. It has been produced by a decay technique involving the decomposition of iodine-129:
Attempts to prepare this compound by combining elemental xenon and bromine only resulted in the XeBr radical. This compound is expected to be less stable than xenon difluoride and xenon dichloride. It is also expected to decompose to xenon and bromine.
Xenon tetrachloride is another noble-gas halide that can only be synthesized by the decay technique.