The invention presented here tackles these problems by presenting a novel kind of general catalyst without classical ligands such as phosphines. His special feature is the introduction of a ligand comprising of N hetero cyclic silylenes coordinated at the rhodium central atom. These ligands possess a free pair of electrons at the silicium atom, modifiing the electronic properties of the metal site. The monosilylene ligands can be linked by spacers to give even bidentate ligands. Polydentate ligands offer a wide variaty of benefits like the formation of more stable complexes and thus more stable and active catalysts as well as the generation of a free coordination site at rhodium to capture and activate the olefine substrate. The large variaty of usable substituents which can be present in the bis-silylene ligands offer a wide range of adjustments of the catalyst for regioselective hydroformylation.