From homogeneous to heterogeneous catalysis: Supported Pd(II) metal complexes with chiral triaza donor ligands

Palladium, rhodium and iridium complexes of chiral triaza ligands are described. The fixation of the preformed triethoxysilyl-palladium, rhodium and iridium complexes, on mesostructured silicates and delaminated zeolites and their use for the hydrogenation reactions are reported. The stable covalent bond between support and complex allows the recovery and recycling of the heterogenised catalysts for a number of cycles.