Vibrational and thermodynamic properties and molecular motions in the incommensurate crystal of morpholinium tetrafluoroborate studied by 1H NMR

► Thermodynamical characteristics of phase transitions in morpholinium tetrafluoroborate. ► Dynamics of the [BF4]− groups is responsible for the phase transition mechanism. Proton dynamics of the (NH2)+ group contributes to the spin-lattice relaxation time.