Beschreibung:
<jats:title>Abstract</jats:title><jats:p>The anomalies of NMR spectra and spin–lattice relaxation time <jats:italic>T</jats:italic><jats:sub>1</jats:sub> in a fluorinated graphite layer intercalated with acetone (stage 1) suggest a phase transition and the existence of an “intermediate” phase in the range of fast molecular diffusion. In the high temperature phase <jats:italic>T</jats:italic><jats:sub>1</jats:sub> and the activation energy <jats:italic>E</jats:italic><jats:sub>a</jats:sub> do not depend on the molecular content <jats:italic>x</jats:italic>. Meanwhile, the concentration dependence of <jats:italic>E</jats:italic><jats:sub>a</jats:sub> and <jats:italic>T</jats:italic><jats:sub>1</jats:sub> in the “intermediate” phase suggests the essential role of intermolecular interactions leading to cooperative effects. An increase of <jats:italic>E</jats:italic><jats:sub>a</jats:sub> with decreasing <jats:italic>x</jats:italic> is interpreted as a consequence of the existence of a molecular sublattice which is incommensurate with the fluorographite lattice. The nature of the phase transition is discussed.</jats:p>