PROTON DYNAMICS IN SOLID NORADRENALINE HYDROCHLORIDE

The temperature dependencies of the proton spin-lattice relaxation tim es and second moment of the H-1 nuclear magnetic resonance line have b een measured for noradrenaline hydrochloride. Two symmetric minima of T-1 are observed. They can be explained in terms of reorientation of t he ammonium groups and proton transfer in the hydrogen bond. The activ ation parameters have been determined.