A NUCLEAR MAGNETIC RESONANCE INVESTIGATION OF CHEMICAL EXCHANGE SPIN DECOUPLING BY NI2+

The concentration and temperature dependence of the proton magnetic resonance spectra of the complex of Ni2+ with dimethyl methylphosphonate was examined. Chemical exchange spin decoupling of the phosphorus nucleus may, depending on temperature, be observed in the proton spectra. Previous work is expanded to include the case in which phosphorus decoupling is not observed in the proton spectra. When decoupling is observed, the resulting phosphorus relaxation times, obtained from the proton spectra, may be governed by the ligand exchange rate. © 1969.