Synthesis of the Smallest Member of the Silylketene Family

H3SiC(H)=C=O

G. Tarczay, Marko Förstel, Sándor Góbi, Pavlo Maksyutenko, Ralf I. Kaiser

Research output: Article

4 Citations (Scopus)

Abstract

Exploiting photoionization reflectron time-of-flight mass spectrometry (PI-ReTOF-MS) combined with electronic structure calculations, it is shown that the hitherto elusive silylketene molecule (H3SiC(H)=C=O)-the isovalent counterpart of the well-known methylketene molecule-is forming via interaction of energetic electrons with low-temperature silane-carbon monoxide ices. In combination with the infrared spectroscopically detected triplet dicarbon monoxide reactant, electronic structure calculations suggest that dicarbon monoxide reacts with silane via a defacto insertion of the terminal carbon atom into a silicon-hydrogen single bond. This is followed by non-adiabatic reaction dynamics triggered by the heavy silicon atom intersystem crossing from the triplet to the singlet manifold, eventually leading to the formation of silylketene. The non-equilibrium nature of the elementary reactions within the exposed ices results in an exciting and novel chemistry which cannot be explored via traditional preparative chemistry. Since the replacement of hydrogen in silane can introduce side groups such as silyl or alkyl, the reaction of triplet dicarbon monoxide with silane represents the parent system for a previously disregarded reaction class revealing an elegant path to access the largely reactive group of silylketenes.

Original languageEnglish
JournalChemPhysChem
DOIs
Publication statusAccepted/In press - 2017

Fingerprint

Silanes
silanes
Ice
Silicon
synthesis
Electronic structure
Hydrogen
ice
chemistry
electronic structure
Atoms
Photoionization
Molecules
silicon
hydrogen
Carbon Monoxide
carbon monoxide
Mass spectrometry
atoms
photoionization

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

Cite this

Synthesis of the Smallest Member of the Silylketene Family : H3SiC(H)=C=O. / Tarczay, G.; Förstel, Marko; Góbi, Sándor; Maksyutenko, Pavlo; Kaiser, Ralf I.

In: ChemPhysChem, 2017.

Research output: Article

Tarczay, G. ; Förstel, Marko ; Góbi, Sándor ; Maksyutenko, Pavlo ; Kaiser, Ralf I. / Synthesis of the Smallest Member of the Silylketene Family : H3SiC(H)=C=O. In: ChemPhysChem. 2017.
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