For Pd 2+ in acetonitrile, the MACE potential was tested on structures generated from 100 ps NVT dynamics using a cluster containing Pd 2+ and 30 MeCN molecules. The solvent molecules in the cluster were confined by a flat-bottom spherical bias potential with a radius of 10.0 Å, centred on Pd 2+ . From the trajectory, 51 structures were extracted. The MAD is 1.04 meV/atom and 8 meV Å-1 for energy and forces respectively. The good correlation with respect to the ground truth energies and the accuracy in forces suggest that the MACE potential closely reproduces the shape of the reference PES, with the higher energy MAD likely arising from a systematic shift in the absolute values, which has been previously reported in some instances with MACE. Overall, the MACE potentials provide a reliable prediction of energies and forces for both tested systems.