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Study of the dynamics of ferrocene enclathrated in β‐ and γ‐cyclodextrins by one‐dimensional switching‐angle sample spinning NMR spectroscopy
Author(s) -
Imashiro Fumio,
Kuwahara Daisuke,
Kitazaki Nobuyuki,
Terao Takehiko
Publication year - 1992
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260300817
Subject(s) - ferrocene , chemistry , nuclear magnetic resonance spectroscopy , spectroscopy , molecule , crystallography , magic angle spinning , analytical chemistry (journal) , nuclear magnetic resonance , stereochemistry , organic chemistry , physics , electrochemistry , electrode , quantum mechanics
13 C 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.