[Rh(PiBu3)2(H3BNMe3)]BArF4 is a rare example of a structurally characterised model compound for the sigma-complex intermediate in the transition metal catalysed amine-borane dehydrogenation. Accurate location of the hydrogen atoms, particularly near rhodium is crucial for two reasons: (1) it will provide useful insight into the Rh-H interactions in such rhodium complexes. (2) It will serve as a model compound for the hydrogen positional and atomic displacement parameters for charge density studies into the bonding in rhodium complexes. We are also very keen to complete studies begun under beam time (RB820110) and acquire a dataset at a second temperature for [Rh(PiPr3)3][BArF4]. This thermochromic complex remains very interesting since solid state thermochromism is often associated with proton shifting, neutron data is still vital in obtaining further insights into this phenomenon.