Origin of Nuclear Magnetic Resonance Shifts in Paramagnetic MnF3

Abstract

The nuclear magnetic resonance of ${\mathrm{F}}^{19}$ in Mn${\mathrm{F}}_3$ has been observed and shifts from the normal resonance field of several percent have been measured. The shifts are paramagnetic, and it is shown that the mechanism of electron transfer cannot account for a shift in this direction. However, the results could be explained by covalent bonding between fluorine and manganese.