41680-29-9Relevant academic research and scientific papers
Synthesis and photolysis of the five possible isomeric phenyl-hexamethyltrisilyl-(cyclopentadienyldicarbonyliron) complexes: (η5-C5H5)Fe(CO)2Si3Me6Ph
Hernandez, Carlos,Sharma, Hemant K.,Pannell, Keith H.
, p. 259 - 264 (1993)
Isomeric phenyl-hexamethyltrisilyliron complexes of the type (η5-C5H5)Fe(CO)2Si3Me6Ph, FpSi3Me6Ph (I-V) have been synthesized, characterized, and photolysed in an inert solvent.Separate photolyses of the linear Fp complexes, e.g.FpSiMe2SiMe2SiMe2Ph (III), result in the transient formation of intermediate isomeric 2-substituted trisilyl Fp complexes, FpSiMe(SiMe3)(SiMe2Ph) (IV) and FpSiPh(SiMe3)2 (V) which photodeoligomerize to FpSiMe3 and FpSiMe2Ph via the intermediacy of Fp disilyl complexes.The product distribution from the photolyses of the Fp complexes is in accord with a mechanism involving equilibrating silyl(silylene) iron complexes.The two branched silyl complexes, FpSiPh(SiMe3)2 and FpSiMe(SiMe3) (SiMe2Ph), isomerize prior to formation of the disilanes whereas the linear trisilanes and disilanes do not interconvert.
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.
