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Triple Bonds to Silicon. Substituent Effects on the Thermodynamic and Kinetic Stabilities of Silynes
 

Summary: Triple Bonds to Silicon. Substituent Effects on the
Thermodynamic and Kinetic Stabilities of Silynes
Relative to Their Isomeric Silylidenes and
Silavinylidenes
Yitzhak Apeloig* and Miriam Karni
Department of Chemistry and the Minerva Center for Computational Quantum Chemistry,
Technion-Israel Institute of Technology, Haifa 32000, Israel
Received October 3, 1996X
Summary: Substituent effects on the potential energy
surface (PES) of RHSiC (R ) H, CH3, SiH3, F, OH) were
studied by ab initio molecular orbital methods. The
unimolecular and kinetic stability of silaacetylenes is
strongly dependent on the substituent, pointing to
FSitCH and ROSitCH as viable candidates for ex-
perimental observation.
The first stable compounds with double bonds to
silicon were synthesized in 1981, and since then they
have been studied extensively both experimentally1 and
theoretically.2 In contrast, stable compounds containing
triply-bonded silicon compounds are still unknown,

  

Source: Apeloig, Yitzhak - Department of Chemistry, Technion, Israel Institute of Technology

 

Collections: Chemistry