We propose to investigate the detailed spectroscopy of the expanded metal systems 7Li(NH3)4 and 7Li(ND3)4 by inelastic neutron scattering. 7Li(NH3)4 shows multiple phase transitions and strong isotope effects and we thus ask for 5 days on TOSCA to study both 7Li(NH3)4 and 7Li(ND3)4 at temperatures around their phase transitions. We will record high quality spectral data at; <15K (Phase III), at 40K and 75K (Phase II) and at 85K (Phase I). Preliminary work, recently undertaken (03/09) as a TOSCA Express experiment and presented here, has demonstrated clear spectral changes that we believe arises as a result of these structural phase changes, first identified by Prof Bill David (Angew. Chem., 48(8), 1435 (2009). These studies will allow us to correlate our obtained spectral data with molecular vibrational models obtained from DFT calculations.