1066-27-9Relevant articles and documents
Haas,Ring
, p. 2253,2255 (1975)
Reaction of silicon atoms with acetylene and ethylene: Generation and matrix-spectroscopic identification of C2H2Si and C2H4Si isomers
Maier, Guenther,Reisenauer, Hans Peter,Egenolf, Heiko
, p. 1313 - 1317 (2007/10/03)
Evaporation of silicon and consecutive cocondensation of the generated atoms with acetylene or ethylene in an argon matrix turnes out to be a new access to C2H2Si and C2H4Si isomers, respectively. In both cases the silicon atoms rather add to the π system than insert into C-H bonds, leading to cyclic silylenes as primary reaction products. In the Si/ acetylene system the primary product is silacyclopropenylidene (2), which shows the already known photochemical interconversion into additional C2H2Si species. On the other hand, cocondensation of silicon atoms with ethylene and subsequent irradiation lead to the matrixisolation of three new C2H4Si isomers [apart from the known silacyclopropene (7) and silylacetylene (8)], namely silacyclopropylidene (10), s-trans-vinylsilylene (11), and the unsubstituted 1-silaallene (13), These species can be identified by comparison of their experimental IR spectra and those obtained by ab initio calculations. In a second reaction path, SiH2, which is formed as a byproduct from atomic silicon and hydrogen impurities, adds to the π system of acetylene, yielding silacyclopropene (7). Silacyclopropane (16), the analogous product of the reaction of SiH2 with ethylene, could not be observed.
Silacyclopropen: Bildung durch Hochvakuum-Blitzpyrolyse und matrixspektroskopische Identifizierung
Maier, Guenther,Pacl, Harald,Reisenauer, Hans Peter
, p. 1627 - 1629 (2007/10/02)
Stichworte: Blitzpyrolyse.Gespannte Ringe.Photochemie.Siliciumverbindungen
