212560-58-2Relevant academic research and scientific papers
Reactions of 1,1-dichloro-, 1-chloro-1-phenyl- and 1-chloro-1-methylsilacyclopent-3-ene with Na[Cp(CO)2Fe]. X-ray diffraction study of the 1-(dicarbonylcyclopentadienyl-ferrio)-1-[4-(dicarbonylcyclopentadienylferrio) but-1-oxy]silacyclopent-3-ene resulting from insertion of an opened THF molecule into a Si-Fe bond
Dufour, Pascal,Dartiguenave, Michele,Dartiguenave, Yves,Simard, Michel,Beauchamp, Andre L.
, p. 53 - 60 (1998)
The reaction of 1,1-dichlorosilacyclopent-3-ene (1), 1-chloro-1-phenylsilacyclopent-3-ene (2) and 1-chloro-1-methylsilacyclopent-3-ene (3) with Na[Cp(CO)2Fe] in a 1/1 ratio yielded yellow crystalline powders of the Cp(CO)2Fe(ClSiC4H6) (5), Cp(CO)2Fe(PhSiC4H6) (6) and Cp(CO)2Fe(MeSiC4H6) (7) complexes, respectively. 1H-NMR spectra indicated that the silacyclopent-3-ene ring in all complexes is puckered in solution. When 1,1-dichlosilacyclopent-3-ene was reacted with two equivalents of Na[Cp(CO)2Fe] in THF, a different complex 8 was produced, resulting from the insertion of an opened THF molecule into a Si-Fe bond. Its crystal structure was determined by single-crystal X-ray diffraction: triclinic, space group P1, a = 7.9334(12), b = 11.596(2), c = 12.939(3) A, α = 75.73(2), β = 75.38(2), γ = 80.05(1)°, Z = 2, R = 0.040, Rw = 0.045. Complex 8 contains two Cp(CO)2Fe fragments, one of which is directly bonded to the Si atom of a silacyclopent-3-ene unit, whereas the other is at the carbon end of an opened THF molecule whose oxygen atom is bonded to same Si atom. Both iron(II) centres possess a pseudo-octahedral coordination created by one Cp ring, two cis CO ligands and, in one case, a Si atom and, in the other, the terminal CH2 group of the opened THF molecule thus acting as a bridging unit between Si and a Cp(CO)2Fe group. Under similar conditions, the above ligands failed to react with Na[Co(CO)4], but the related Co(CO)4(1,3-Me2SiC4H5) molecule was synthesized from 1,3-dimethylsilacyclopent-3-ene via a hydrosilylation reaction.
