ANALYSIS OF BORANES AND CARBORANES BY MASS SPECTROMETRY.
SPACE-GENERAL CORP LOS ANGELES CALIF CENTER FOR RESEARCH AND EDUCATION
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Boranes and carboranes each have their own characteristic mass spectral patterns which serve as means for quick identification and analysis. The so-called stable boranes fragment rather severely under electron impact, the unstable boranes even moreso. Both types have broad, rounded spectral profiles. Closocarboranes which are a very stable class of compounds, on the other hand, are very resistant to fragmentation, and consequently display sharp cut-offs at their high mass numbers. Alkylated derivatives of both boranes and carboranes have the same general fragmentation patterns as do their nonalkylated parents. A useful mass spectrometric technique applicable to these compounds to determine the number of boron and carbon atoms involves careful measurement of the 13C- containing ion that appears above the normal cut-off peak. The method is illustrated with C4B6H12, the dimethyl derivative of the carborane, C2B6H8. Author
- Inorganic Chemistry
- Organic Chemistry