The present invention includes at least one metal atom and one or more ligands selected from metals of Groups 8, 9 and 10 of the Periodic Table of the Elements, wherein at least one ligand has a cyclic silylene structure and the cyclic silylene Metal complexes comprising Lewis bases that donate an electron pair to a silicon atom of the structure, these metal complexes being particularly suitable for use in catalysts, in particular hydrosilylation.
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