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Ion chemistry in tetramethylsilane (CH3)4Si

✍ Scribed by S. McGinnis; K. Riehl; P.D. Haaland

Book ID
103034582
Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
298 KB
Volume
232
Category
Article
ISSN
0009-2614

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✦ Synopsis

The cross sections for simple and dissociative ionization of tetramethylsilane ((CHa)4Si or TMS) by electron impact have been measured using Fourier-transform mass spectrometry. The total ionization cross section is 8.5 Γ— 10-~6 cm 2 between 30 and 70 eV. The molecular ion is Jahn-Teller unstable, with dissociative ionization to form (CH3)aSi + dominating the mass spectrum. CHaSiH~ and CH3Si + react rapidly with TMS to produce (CHa)3Si +. (CH3)3Si + does not react with TMS but is slowly hydrated by background water vapor.

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