Cl35 NMR Contact Shifts in Aqueous Cobaltous Chloride Solutions

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Abstract
The NMR shifts of the Cl35 nucleus in aqueous cobaltous chloride solutions have been measured relative to the free chloride ion. The displacement of the Cl35 resonance to lower applied fields at constant frequency becomes larger with both increasing cobaltous and chloride ion concentrations. The effect of added non‐complexing salt indicates the significant role hydration plays in the complex equilibria taking place. The magnitudes of the observed shifts point to an isotropic electron‐spin‐nuclear‐spin contact interaction in the complexed cobaltous chloride.