36835-55-9Relevant academic research and scientific papers
A new approach to directly synthesize (η5-C 5H4R)Fe(CO)2SiR′3 by reaction of cyclopentadienes with pentacarbonyliron and hydrosilanes
Gu, Guangna,Luo, Haiou,Sun, Huailin
, p. 1710 - 1714 (2014/05/06)
A new approach to the direct synthesis of Fe-Si-bonded complexes (η5-C5H4R)Fe(CO)2SiR′ 3 (1) by the reaction of cyclopentadienes C5H5R (2) with pentacarbonyliron in the presence of hydrosilanes R′ 3SiH (5) has been developed. Thus, when the reaction of 2 and pentacarbonyliron in refluxing p-xylene was performed in the presence of 5, the desired complexes were successfully obtained in good yields, providing a simple one-step synthetic route to obtain 1 from the readily available starting materials, wherein the substituents R and R′ could vary over a wide range: C5H5R = C5H5SiMe 2SiMe3, R′3 = Ph3 (1a); C 5H5R = C5H5SiMe2SiMe 2Ph, R′3 = Ph3 (1b); C5H 5R = C5H5SiMe2SiMePh2, R′3 = Ph3 (1c); C5H5R = C 5H5SiMe2SiPh3, R′3 = Ph3 (1d); C5H5R = C5H 5SiPh2SiPh3, R′3 = Ph 3 (1e); C5H5R = C5H 5SiMe3, R′3 = Ph3 (1f); C 5H5R = C5H6, R′3 = Ph3 (1g); C5H5R = C5H5Me, R′3 = Ph3 (1h); C5H5R = C5H5CH2Ph, R′3 = Ph 3 (1i); C5H5R = MeC5H 4SiMe3, R′3 = Ph3 (1j); C 5H5R=C9H8, R′3 = Ph3 (1k); C5H5R = C5H 5SiMe2SiMe2Ph, R′3 = Me 2Ph (1l); C5H5R = C5H 5SiMe2Ph3, R′3 = Me 2Ph (1m); C5H5R = C5H 5SiPh2SiPh3, R′3 = Me 2Ph (1n); C5H5R = C5H 5CH2Ph, R′3 = Me2Ph (1o). A plausible mechanism involving interception of coordinatively unsaturated iron species (η4-C5H5R)Fe(CO)2 by oxidative addition of the Si-H bond is believed to be responsible for the preferred formation of the desired product.
Photochemical transformations of digermyl and isomeric silylgermyl and germylsilyl complexes of the (η5-C5H5)Fe(CO)2 system. Significant stability of germylene versus silylene intermediates
Pannell, Keith H.,Sharma, Sneh
, p. 1655 - 1656 (2008/10/08)
Photochemical treatment of the (digermyl)iron complex (η5-C5H5)Fe(CO)2GeMe 2GePh3 (FpGeMe2GePh3) produced a mixture of FpGeMe2Ph (10%), FpGeMePh2 (82%), and FpGePh3 (8%), a result that parallels the photochemistry of related Fp-disilyl complexes. Photochemical treatment of FpSiMe2GeMe3 yielded FpSiMe3 (>95%) and traces of FpGeMe3, whereas photochemical treatment of (η5-C5H5)Fe(CO)2SiMe 2GePh3 yielded FpSiMePh2 (66%), FpSiMe2Ph (20%), and FpSiPh3 (14%), i.e. no Fp-germyl complexes. The mechanism of these transformations parallels that reported for the related disilyl complexes, with the important distinction that intermediate silyl germylene complexes are more thermodynamically favored than the related germyl silylene intermediates. Photolysis of the isomeric (η5-C5H5)Fe-(CO)2GeMe 2SiPh3 produces the same Fp-silyl complexes, but in different yields, plus small amounts of the corresponding FpGeR3 complexes, suggesting that complexes with direct Fe-Ge bonds possess another minor, and as yet unclear, pathway for photochemical degradation.
Synthesis and Photochemical Deoligomerizations of a Series of Isomeric Disilyliron Complexes: (η5-C5H5)Fe(CO)2Si2Ph3-nMe2+n
Pannell, Keith H.,Rozell, James M.,Hernandez, Carlos
, p. 4482 - 4485 (2007/10/02)
A series of six disilyl complexes of the general type (η5-C5H5)Fe(CO)2Si2Ph3-n)Me2+n, representing three isomeric pairs, have been synthesized and characterized.Photolysis of each complex leads to the formation of a series
Polysilane-metal interactions. Photochemical deoligomerizations and base treatment migrations from iron to cyclopentadienyl ligands
Pannell, Keith H.,Cervantes, Jorge,Hernandez, Carlos,Cassias, Jeff,Vincenti, Steven
, p. 1056 - 1057 (2008/10/08)
Iron (Fp) derivatives of polysilanes have been shown to deoligomerize photochemically to yield monosilyl iron complexes and to migrate from iron to the cyclopentadienyl ligand upon treatment with n-butyllithium. The migratory aptitude of various polysilanes has been determined. Photochemical treatment of the migrated products does not lead to deoligomerization. Infrared and 29Si NMR data are reported.
