110551-83-2Relevant articles and documents
METHOD OF PRODUCING ORGANIC SILICON COMPOUND
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Paragraph 0036; 0037, (2017/03/23)
PROBLEM TO BE SOLVED: To provide a method of producing an organic silicon compound efficiently by improving a catalyst for hydrosilylation reactions of alkenes and alkynes. SOLUTION: An organic silicon compound can be produced efficiently by using an iron
Organometallic intermediates in the controlled radical polymerization of styrene by α-diimine iron catalysts
Shaver, Michael P.,Allan, Laura E. N.,Gibson, Vernon C.
, p. 4725 - 4730 (2008/10/09)
The α-diimine iron complexes R′,R″[N,N] FeCl2 (R′,R″[N,N] = R′-N=CR″- CR =N-R′) are efficient catalysts for the atom-transfer radical polymerization (ATRP) of styrene when R′ and R″ are electrondonating substituents and favor catalytic chain transfer (CCT) when electron-withdrawing substituents are employed. An organometallic pathway, alongside a halogen-atom-transfer equilibrium, is proposed to mediate the observed reactivity. The model alkyl complexes, R′,R″[N,N] FeCl2(R), where R = PhCH2 and Ph(Me)CH, were generated via treatment of R′,R″[N, N]FeCl3 with RMgCl. The alkyl derivatives obtained from intermediate spin-state R′,R″[N,N]FeCl3 complexes were found to be stable to ca. -30 °C and favor CCT, whereas the alkyl derivatives derived from high-spin-state trichloride precursors are unstable above -78 °C and favor ATRP. Azo-initiated polymerizations of styrene are moderately controlled by a-diimine iron catalysts. The role of organometallic-mediated radical polymerization (OMRP) in the controlled polymerization of styrene is discussed: an analysis of the radical concentrations generated by the competing OMRP and ATRP equilibria indicates that the halogenophilicity of the Fe(II) catalyst dominates the carbophilic alkyl radical-trapping capacity of the Fe(II) species in this a-diimine catalyst system.
Four-coordinate iron complexes bearing α-diimine ligands: Efficient catalysts for Atom Transfer Radical Polymerisation (ATRP)
Gibson, Vernon C.,O'Reilly, Rachel K.,Reed, Warren,Wass, Duncan F.,White, Andrew J. P.,Williams, David J.
, p. 1850 - 1851 (2007/10/03)
Four-coordinate iron(II) complexes bearing α-diimine ligands with alkyl substituents are shown to be efficient catalysts for the well-controlled atom transfer radical polymerisation of styrene; catalysts containing aryldiimine ligands support competitive