STUDIES OF METHYL DERIVATIVES OF 1,2 DICARBA CLOVOPENTABORANE(5).
Abstract
The thermal stability of C,3-dimethyl-1,2-dicarba clovopentaborane(5) 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-(CH3)2-1,1-C2B3H3 and C,3,5-(CH3)3-1,2-C2B3H2. No rearrangement of the 1,2- carborane cage structure was observed, and the higher methylated derivatives were more stable than C,3-(CH3)2-1,2-C2B3H3. C,3-(CH3)2 -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)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 03, 1966
- Accession Number
- AD0632793
Entities
People
- Russell N. Grimes
Organizations
- University of Virginia