Study of the dynamics of ferrocene enclathrated in β‐ and γ‐cyclodextrins by one‐dimensional switching‐angle sample spinning NMR spectroscopy

Abstract 13C chemical shift powder patterns of ferrocene enclathrated in β‐ and γ‐cyclodextrins were measured by one‐dimensional switching‐angle sample spinning NMR spectroscopy. The ferrocene molecules were found to precess with a precession angle of 69° in γ‐cyclodextrin. In β‐cyclodextrin the ferrocene molecules I–III, in different motional states, were enclathrated with populations of 0.42, 0.32 and 0.26, respectively; ferrocene I is tightly enclathrated and rotates around its fivefold axis, whereas ferrocenes II and III precess with precession angles of 30° and 42°, respectively.