Accession Number:

AD0632793

Title:

STUDIES OF METHYL DERIVATIVES OF 1,2 DICARBA CLOVOPENTABORANE(5).

Descriptive Note:

Technical rept.,

Corporate Author:

VIRGINIA UNIV CHARLOTTESVILLE DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1966-05-03

Pagination or Media Count:

14.0

Abstract:

The thermal stability of C,3-dimethyl-1,2-dicarba clovopentaborane5 was examined in the liquid and vapor states. Pyrolysis of the liquid at 130C yielded a trimethyl and two tetramethyl derivatives of 1,2-C2B3H5 plus trimethyl boron and nonvolatile solids. The vapor diluted in helium was unreactive at 115C but at 230C partially reacted to give C,5-CH32-1,1-C2B3H3 and C,3,5-CH33-1,2-C2B3H2. No rearrangement of the 1,2- carborane cage structure was observed, and the higher methylated derivatives were more stable than C,3-CH32-1,2-C2B3H3. C,3-CH32 -1,2-C2B3H3 reacted with 2,4,6-collidine to produce a red complex. The significance of the stability of the methylated 1,2-C2B3H5 structure is discussed in relation to other experimental and theoretical studies of the carboranes. Author

Subject Categories:

  • Inorganic Chemistry
  • Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE