STUDIES OF METHYL DERIVATIVES OF 1,2 DICARBA CLOVOPENTABORANE(5).
VIRGINIA UNIV CHARLOTTESVILLE DEPT OF CHEMISTRY
Pagination or Media Count:
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
- Inorganic Chemistry
- Organic Chemistry