Novel Organoboranes as Intermediates for Ceramic Precursors and High-Energy Fuels
Abstract
This project investigated, as its primary objective, the influence of carbon-boron bonding in unsaturated, cyclic boranes on the energy content of this system. such insights should aid the choice of the best carbon-boron clusters to be incorporated into high-energy fuels. The synthesis and structural characterization of the following boron-containing carbocycles were undertaken: The borirene or boracyclopropene system, as exemplified by trimesitylborirene: the borole or boracyclopentadiene ring, as represented by pentaarylboroles: the borepin or boracycloheptatriene nucleus, as seen in heptaphenylborepin; the 7-borabicyclo 2.2.1 heptadiene system, again typified by its heptararyl derivative; and the 1-boratetrahydronaphthalene derivative, which was the thermal rearrangement product of the borepin. As estimated by chemical reactivity towards heat, oxidants and protolyzing agents, the borirene and borole nuclei display unusual stability and thus can be termed aromatic. The boroles are very reactive and possess destabilization or be antiaromatic. A rich variety of both thermal and photochemical skeletal rearrangements was uncovered with these boracyclopolyenes, indicating that tricoordinate boron has a pronounced tendency to interact either intermolecularily or intramolecularily, with pi-electrons. As a secondary objective, bimetallic oxides of the type, R2M-O-M'R2, were synthesized and evaluated as hydrocarbon-soluble precursors to specialized ceramics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1989
- Accession Number
- ADA206101
Entities
People
- John J. Eisch
Organizations
- Binghamton University