Isolation of New Disilanylene‐bridged Bis(cyclopentadienyl)‐tetracarbonyldiiron Complexes and Molecular Structure of [η⁵,η⁵‐C₅H₄SiMe(SiMePh₂)C₅H₄]Fe₂(CO)₂(μ‐CO)₂

Abstract

Abstract1,2‐Diphenyl‐1,2‐dimethyldisilanylene‐bridged bis‐cyclopentadienyl complex [η5,η5‐C5H4PhMeSiSiMePh‐C5H4]Fe2(CO)2(μ‐CO)2 (1) was synthesized by a modified procedure, from which the trans‐isomer 1b that was previously difficult to obtain has been isolated for the first time. More interestingly, two new regio‐isomers [η5,η5‐C5H4SiMe(SiMePh2)C5H4]Fe2(CO)2(μ‐CO)2 (2) and [η5,η5‐C5H4Me2SiSiPh2C5H4]Fe2(CO)2(μ‐CO)2 (3) were occasionally obtained during above process, the novel structures of which opened up new options for further study of this type of Si–Si bond‐containing transition metal complexes. The molecular structure of 2 has been determined by the X‐ray diffraction method.

Synthesis and Properties of Structural Variants of the Si−Si Bridged Bis(cyclopentadienyl)tetracarbonyldiiron Complexes: Modification on the Bridge

“…to give a solid residue, which was purified through a neutral alumina column. Elution with petroleum ether/dichloromethane (2:1) gave a red band, from which 0.93 g of 7 (22% yield) was obtained as dark red crystals, mp 184−186 °C. IR (KBr): ν CO 1982 (s), 1937 (s), 1810 (s), 1770 (s) cm −1 .…”