Accession Number : AD0641578

Title :   ANALYSIS OF BORANES AND CARBORANES BY MASS SPECTROMETRY.

Descriptive Note : Technical rept.,

Corporate Author : SPACE-GENERAL CORP LOS ANGELES CALIF CENTER FOR RESEARCH AND EDUCATION

Personal Author(s) : Ditter,J. F. ; Gerhart,F. James ; Williams,Robert E.

Report Date : 12 OCT 1966

Pagination or Media Count : 33

Abstract : 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)

Descriptors :   (*BORANES, *MASS SPECTROSCOPY), (*ORGANOBORANES, MASS SPECTROSCOPY), MASS SPECTRA, DECOMPOSITION, CHEMICAL ANALYSIS, MOLECULAR STRUCTURE, ISOTOPES

Subject Categories : Inorganic Chemistry
      Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE