87412-17-7Relevant academic research and scientific papers
Reactivity of [bis(dimethylgermyl)alkane]iron tetracarbonyls with carbonyl compounds
Barrau, Jacques,Hamida, Najib Ben,Agrebi, Hamid,Satgé, Jacques
, p. 1674 - 1678 (2008/10/08)
[Bis(dimethylgermyl)alkane]iron tetracarbonyls, Me2Ge(CH2)nGeMe2Fe(CO)4 (n = 1, 2), react with chloral, propionaldehyde, and benzaldehyde to give heterocyclic expansion reactions. Thermal decompositio
A new route to metal alkylidene complexes. Synthesis of ylide adducts (CO)4Fe-CH(R)P+Ar3 from aldehydes, triarylphosphines, and (CO)4FeSi(CH3)2CH2CH 2Si(CH3)2
Nakazawa, Hiroshi,Johnson, Dennis Lee,Gladysz
, p. 1846 - 1851 (2008/10/08)
Chelated disilane complex (CO)4FeSi(CH3)2CH2CH 2Si(CH3)2 (1) is treated with a variety of aromatic and aliphatic aldehydes (RCHO). Disiloxane OSi(CH3)2CH2CH2Si(CH 3)2 (2), iron carbonyls, and, in the case of benzaldehyde, trans-stilbene are formed. When these reactions are conducted in the presence of P(C6H5)3 or P(p-C6H4CH3)3, ylide complexes (CO)4Fe-CH(R)P+Ar3 are isolated in high yields. The displacement of P(C6H5)3 from (CO)4Fe-CH(p-C6H4OCH 3)P+(C6H5)3 (4) by P(CH3)3 is shown to proceed via a dissociative mechanism. All of these reactions are interpreted as proceeding via reactive alkylidene intermediates (CO)4Fe=CHR. Protonation of (CO)4Fe-CH(C6H5)P+(C 6H5)3 (3) with CF3SO3H affords C6H5CH2P+(C6H 5)3CF3SO3-. The spectral properties, relative stabilities, and mechanism of formation of the ylide complexes are discussed. It is proposed that the formation of disiloxane 2 constitutes a powerful driving force for the generation of (CO)4Fe=XLn species from 1 and O=XLn precursors.
