The molecular behaviour of six-membered ring guests in cyclophosphazene inclusion compounds

The molecular behaviour of six-membered ring compounds in cyclophosphazene inclusion compounds is studied by dynamic H-2 NMR spectroscopy. The analysi s of the variable temperature NMR experiments provides a detailed picture a bout the guest mobility as well as the ordering behaviour of the guest spec ies in such systems. It is found that the guest dynamics is rather complex with various intramolecular and intermolecular motional contributions. both of which giving rise to dynamic guest disorder. The intermolecular motions are found to depend strongly on the particular guest compound and dominate the experimental NMR data in the low temperature range beyond 150 K.