A determination of the activation energy of cyclopentadienyl group rotation and molecular tumbling in [Fe(? 5-C5H5)(? 5-C5H4R)](R = CMe2Et or Bun) using carbon-13 nuclear magnetic resonance relaxation measurements

Abstract

From variable-temperature 13C spin-lattice relaxation time and nuclear Overhauser enhancement measurements in [2H8]toluene solution at 25 and 100 MHz, the activation energies for ring rotation and molecular tumbling have been determined for n-butylferrocene and t-pentylferrocene.