Proton magnetic resonance in CoHgCl4· 4H2O

Abstract Proton magnetic resonance in a new paramagnetic crystalline hydrate, cobalt mercuric chloride tetrahydrate, was observed using a CW wide line NMR spectrometer. The resonance spectra showed appreciable asymmetry caused by the paramagnetic influence of Co 2+ ions at the proton sites. The angular dependence of the resonance splittings about each of the three crystallographic axes was analysed to determine the p-p vectors in the unit cell of the crystal, and the angular variation of paramagnetic shift about the [001] axis of rotation was studied.