Silicon–transition-metal compounds. Part IV. Tetracarbonyldisilyliron and hydridotetracarbonylsilyliron

Abstract

The reaction of iodosilane with disodium tetracarbonylferrate (–II)produces tetracarbonyldisilyliron (SiH₃)₂Fe(CO)₄, together with some hydridotetracarbonylsilyliron and dihydridotetracarbonyliron. Physical properties of the two silyl–iron derivatives reported include their i.r. spectra, from which a cis-octahedral structure is inferred. At 110°, the disilyl compounds begins to decompose in vacuo, yielding hydrogen, silane, hydridotetracarbonylsilyliron, and a brown solid. Water and hydrogen chloride break the Si–Fe bond, giving disiloxane, or chlorosilane and hydridoiron derivatives. The adduct (SiH₃)₂Fe(CO)₄,2NMe₃ is almost involatile at room temperature; chemical and i.r. spectral evidence suggest that it is (SiH₃,NMe₃)₂Fe(CO)₄.