101348-76-9Relevant academic research and scientific papers
(Carbonyl)iron-selenolates: New synthetic methods and reactions with electrophiles. Crystal structures of [(CO)6Fe2(μ-SeR)2]; R = Me3SiCH2 and p-O2NC6H4CH2, {(CO)6Fe2[μ-η2-Se,Se′-o-(SeCH2C6H4CH2Se)]}
Jaeger, Stefan,Jones, Peter G.,Laube, Joerg,Thoene, Carsten
, p. 352 - 358 (1999)
The reactions of Fe(CO)5 or Fe3(CO)12 with NaBEt3H or KB[CH(CH3)C2H5]3H, respectively and treatment of the resulting carbonylates M2Fe(CO)4, M = Na, K with elemental selenium in appropriate ratios lead to the formation of M2[Fe2(CO)6(μ-Se)2]. Subsequent reactions with organo halides or the complex fragment cpFe(CO)2+, cp = η5-C5H5 afforded the selenolato complexes [Fe2(CO)6(μ-SeR)2], R = CH2SiMe3 (1), CH2Ph (2), p-CH2C6H4NO2 (3), o-CH2C6H4CH2 (4) and cpFe(CO)2+ (5) in moderate to good yields. A similar reaction employing Ru3(CO)12, Se and p-O2NC6H4CH2Br leads to the formation of the corresponding organic diselenide. The X-ray structures of 1, 3, 4 and 5 were determined and revealed butterfly structures of the Fe2Se2 cores. The substituents in 1, 3 and 5 adopt different conformations depending on their steric demand. In 4, the conformation is fixed because of the chelate effect of the ligand. The Fe-Se bond lengths lie in the range 235 to 240 pm, with corresponding Fe-Fe bond lengths of 254 to 256 pm. The 77Se NMR data of the new complexes are discussed and compared with the corresponding data of related complexes.
