The aim is to contrast the diffusion of cyclohexanone oxime, cyclododecanone oxime and their corresponding amides in both the smaller pore MFI framework and the larger pore framework of Zeolite-Y and SAPO-37 (FAU). These are relevant to the industrial production of nylon monomers. Corresponding catalytic data is already in-place, using the novel low-temperature liquid Beckmann rearrangement method, and measuring the diffusion coefficients through neutron scattering will facilitate structure-activity relationships to be established.