We request 5 days on IRIS to investigate the hindrance to molecular rotation of ammonia in a zeolite framework due to hydrogen bonding interactions. This is a tied proposal to one submitted for MARI (whereby the Q dependence of the partial phonon density of states will be investigated). When ammonia enters a framework material (such as a zeolite or MOF) it is able to coordinate directly to cationic species. This gives rise to features in the INS spectrum due to specific molecular displacements of the ammonia molecule. It is unknown whether the ammonia rotation (about its coordinating axis) is a simple three-well potential, but is suggested that hydrogen bonding to the framework impedes such. We aim to show correlations between framework/ammonia quasielastic spectra with increasing temperature, as the coordination varies from tethered to freely rotating and then self diffusing.