Abstract

Abstract A new theoretical relation between proton and cobalt-59 chemical shifts in cobalt(III) compounds has been established on the assumption that the proton shift comes primarily from the anisotropy of the second-order paramagnetism of the central cobalt(III) ion. The additivity observed for cobalt-59 chemical shifts in solution is explained and applied to the problem of proton shifts. The relation between 1H and 59Co chemical shifts, coupled with this additivity, allows one to calculate the chemical shift of a proton under the influence of the paramagnetic anisotropy of a cobalt ion.

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