Abstract:Isotropic n.m.r. shifts of several Co(I1) complexes involving P-diketonate ligands are reported. A change of substituent on one P-diketonate ligand significantly affects the shifts of protons or fluorine atoms on the other P-diketonate ligand of the same compound. An argument is presented to suggest that these substituent shifts arise predominantly from contact rather than dipolar effects. The pattern of shifts is compared with that previously observed for P-diketone complexes of V(II1) and a similar interpret… Show more
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