JMSSJ On-line, Vol. 51 (2003) No. 2, pp. 365-367
Unimolecular Gas-phase Reactions of Organosilicon Compounds.Part XV. Acetyltrimethylsilane, CH3COSi(CH3)3
>> Full Text PDF
>> References
    Susumu TAJIMA,*a) Daisuke WATANABE,a) Satoshi NAKAJIMA,a) and Nico M. M. NIBBERINGb)

    *a)Chemistry and Materials Science, Gunma National College of Technology (Maebashi, Gunma 371-8530, Japan) b) Laser Centre and Chemistry Department, Free University (De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands)
Unimolecular metastable ion decompositions of acetyltrimethyl silane, CH3COSi(CH3)3 (MW: 116, (1)) generated by electron ionization, have been investigated by use of mass-analyzed ion kinetic energy (MIKE) spectrometry and D-labeling. In the metastable time window, the molecular ions 1+ • decompose exclusively into the ions at m/z 101, [M-CH3]+. A considerable extent of H/D exchange occurs prior to this [M-CH3]+ formation. However, the H/D exchange is hardly observed for the [M-CH3]+ formation in the ion source. The generated m/z 101 ions from 1+ • consist of two isomeric ions. A trimethylsilyl ion, (CH3)3Si+, at m/z 73 is generated by at least three different routes.
Key words: Acetyltrimethylsilane, MIKE spectrometry, Trimethylsilyl ion, D-labeling, H/D exchange
[ Full Text PDF ]    [ References ]
© COPYRIGHT by The Mass Spectrometry Society of Japan. All Rights Reserved.