136839-66-2Relevant academic research and scientific papers
Preparation of New Monomeric, Oligomeric, and Polymeric Silyl Triflates
Uhlig, Wolfram
, p. 47 - 54 (2007/10/02)
The highly reactive silyl triflates R3SiOSO2CF3 are valuable reagents in organosilicon chemistry.New triflate derivatives of mono- and oligosilanes have been prepared by substitution of phenyl groups or hydrogen atoms for the trifluoromethanesulfonyl group.The presence of the electron-withdrawing triflate group leads to a strong deactivation of the other substituents at the silicon atom, and the displacement of a second phenyl group at the same silicon atom is much slower than the first step.For this reason in the case of phenylated oligosilanes stepwisemonosubstitution of the silicon atoms has been found.Other new oligomeric silyl triflates are obtained by reaction of silanediyl(triyl) bis(tris)(trifluoromethanesulfonates) with lithium derivatives of organosilicon compounds.Finally, the cleavage of silicon - phenyl bonds of poly by CF3SO3H leads to triflate derivatives of polysilanes. Key Words: Silyl triflates / Organosilanes
Zum gezielten Aufbau oligomerer Strukturen der Elemente der 14. Gruppe mittels ihrer Triflatderivate
Uhlig, W.
, p. 189 - 197 (2007/10/02)
Oligosilanes as well as germyl- and stannylsilanes with variable substituents are obtained by reaction of element triflates with lithium derivatives of the elements of group 14.Syntheses are characterized by high regioselectivity and short reaction times at low temperatures.Exchange processes similar to metal halogen exchange are not observed.In this way the selective preparation of higher oligomers of silicon, germanium and tin has been made possible.
