Synthesis and structure of silylene iron complex

Four phosphorus-chalcogen chelated hydrido iron(II) complexes 5-8 (o-(Ph2P)-p-R-C6H4Y)Fe(H)(PMe3)(3) (5: R=H, Y=S; 6: R=Me, Y=S; 7: R=H, Y=O and 8: R=Me, Y=O) were used to synthesize the corresponding silylene hydrido iron(II) complexes. It was found that complexes 5-6 reacted with chlorosilylene 1 to give the silylene iron(II) hydrides 9-10 as ligand replacement products of trimethylphosphine by chlorosilylene 1. Under the same reaction conditions, complex 7 or 8 reacted with chlorosilylene 1 to afford a disilylene iron(I) chloride 11. Complex 11 can also be synthesized through the reaction of Fe(PMe3)(4) with chlorosilylene 1. The molecular structures of complexes 9-11 were determined by single crystal X-ray diffraction analysis.