  X-ray characterisation methods have undoubtedly enabled cutting-edge advances
in all aspects of materials research. Despite the enormous breadth of
information that can be extracted from these techniques, the challenge of
radiation-induced sample change and damage remains prevalent. This is largely
due to the emergence of modern, high-intensity X-ray source technologies and
growing potential to carry out more complex, longer duration in-situ or
in-operando studies. The tunability of synchrotron beamlines enables the
routine application of photon energy-dependent experiments. This work explores
the structural stability of [Rh(COD)Cl]2, a widely used catalyst and precursor
in the chemical industry, across a range of beamline parameters that target
X-ray energies of 8 keV, 15 keV, 18 keV and 25 keV, on a powder X-ray
diffraction synchrotron beamline at room temperature. Structural changes are
discussed with respect to absorbed X-ray dose at each experimental setting
associated with the respective photon energy. In addition, the X-ray radiation
hardness of the catalyst is discussed, by utilising the diffraction data at the
different energies to determine a dose limit, which is often considered in
protein crystallography and typically overlooked in small molecule
crystallography. This work not only gives fundamental insight into how damage
manifests in this organometallic catalyst, but will encourage careful
consideration of experimental X-ray parameters before conducting diffraction on
similar radiation-sensitive organometallic materials.
