Cobalt complexes with ytterbium complex

Non-bonded interactions [632-634] were included in the same way as was used first for the modeling of cobalt(III) complexes [130] and more recently for a wide range of transition metal compoimds [95, 104, 125]. That is, standard models with M-L harmonic bond-stretching terms were used, but the L-M-L harmonic terms were deleted and L... L non-bonded interactions were used in their place. In the first of these studies, on lanthanoid shift reagents, two seven-coordinate europium(III) and ytterbium(III) complexes, [Eu(dipivaloylmethanato)3(quinuchdine)] and [Yb (acetylacetonato)3(H20)] (Figure 15.5), were modeled [632]. The structures of these complexes were well reproduced. In a subsequent study, these complexes and [Eu (dipivaloylmethanato)3(DMSO)] were studied with the same force field, while the random incremental pulse search method was used to locate all potential coordination geometries [633]. 

There are coimtless articles dealing with immobilization of inorganic ions, especially with that of environmental importance (e.g., ions of toxic elements such as arsenic, lead, chromium, cobalt that of radionucleides cesium, nickel, strontium, ytterbium or subsurface aquifer pollutants ions like nitrate, nitrite, and fluoride). Surface complexation modeling was successfully applied in several cases. I quote only some recent articles as instances. 

---