73151-72-1Relevant articles and documents
Photoionization mass spectrometric studies of the transient species Si2Hn (n = 2-5)
Ruscic, B.,Berkowitz, J.
, p. 2416 - 2432 (2007/10/02)
The transient species Si2H5, Si2H4, Si2H3, and Si2H2 have been prepared for the first time, by reactions of F atoms with Si2H6.The species are generated in situ and studied by photoionization mass spectrometry.The adiabatic ionization potentials are (in e
Gas-phase homolytic substitution reactions of hydrogen atoms at silicon centers
Fabry,Potzinger,Reimann,Ritter,Steenbergen
, p. 1231 - 1235 (2008/10/08)
The reaction of H atoms with a number of mono-, di-, and trisilanes has been studied with the view of examining the possible occurrence of a homolytic substitution reaction (SH2). Arrhenius parameters for abstraction plus substitution have been determined for the reaction of H atoms with Si2H6, Me3SiSiMe2H, Me3SiSiCl3, Si2Cl6, and Me8Si3. The ratio of substitution vs. abstraction was determined. It is found that di- and trisilanes react fast by an SH2 reaction while monosilanes are unreactive. Ligands with a -I effect cause a decrease in reactivity. The experimental facts are explained by a frontside attack of the H atoms due to the favorable interaction of the singly occupied orbital at the H atom with the energetically high-lying Si-Si orbital.