Paramagnetic shifts of DMF (N,N-dimethylformamide) and DMA (N,N-dimethylacetamide) induced by U(V) were studied by the 1H and 13C NMR spectroscopy. It was found that the 1H and 13C NMR signals of bulk DMF and DMA exhibited the paramagnetic shifts to the higher field by U(V). Positive pseudocontact shift and negative contact shift for both DMF and DMA are discussed on the basis of the electronic structure of U(V) complexes. The values of magnetic susceptibilities of U(V) complexes are also presented.
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Harazono et al. (1986) studied this question.
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