Ligand field interpretation of metal NMR chemical shifts in octahedral d6 transition metal complexes

Among transiton metal complexes with the spin-paired dq electronic configuration, the octahedral D6 complexes are most widespread. From the early transition metal complexes of vanadium (-I) to the late transition metal complexes of platinum (IV) a rich chemistry of the d6 configuration may be followed. Therefore it is not surprising that the main body of transition metal NMR data is on complexes with this configuration. Very valuable data have been collected not only on chemicals shifts, but also on metal NMR relaxation and spin-spin coupling constants. However, this review concentrates on metal chemicals shifts since they are most directly related to ligand field parameters. (author). 146 refs.; 12 figs.; 25 schemes.; 12 tabs