13C and1H NMR study of molecular motion in the deoxycholic acid-ferrocene solid inclusion compound

Abstract

Using solid-state13C NMR spectroscopy and also measurements of proton spin-lattice relaxation times T1 and second moments M2, we have investigated molecular motion in solid inclusion compounds of deoxycholic acid with ferrocene in the interval 100–400 K. We have identified various dynamic processes occurring with participation of molecules of the matrix and the included molecules. We have shown that in addition to rapid reorientations of the cyclopentadienyl rings, the ferrocene molecules undergo 180° jumps about the C2 axis. We have determined the parameters for all the molecular motions. We discuss the conformational state of the included molecules.