Catalysts trianion

The trianionic cobalt catalyst has been successfully employed in the hydrogenation of 1,3-butadiene in [bmim][BF4] [10], The product from this reaction is 1-butene which is formed with 100% selectivity. Unfortunately the catalyst undergoes a transformation to an inactive species during the course of the reaction and reuse is not possible. The cationic rhodium catalyst together with related derivatives have been used for numerous reductions, including the hydrogenation of 1,3-cyclohexadiene to cyclohexane in [bmim][SbF6] [11],... 

The title ligands are the monoanionic 10 (see Section 4.2.5), 26-29 and 54 (see also 79, 80 and 83), the dianionic 30-52 (see also 77) and the trianionic 53 (see also 84). These are chelating ligands, hence firmly bound to the Ln core. Their function has largely been that of supporting ligands. Some of them have had a role not only in /-block but also early d-block metal chemistry certain of the derived compounds have been examined as catalysts for a variety of organic chemical transformations. 

---