Abstract
AbstractRelationships between the magnitude of induced 1H NMR shifts and the equilibrium conditions in solutions containing lanthanide shift reagents are discussed and applied to the shifts induced in several organic molecules by Eu(DPM)3. Evidence that monoadduct formation is the predominant equilibrium in these solutions, and values of absolute shifts and equilibrium constants are reported. The results indicate that a contact mechanism makes the major contribution to the observed shifts in 4‐methylpyridine. In the case of 2,4,6‐trimethylpyridine the observed shifts are largely pseudocontact in origin.
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