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Unknowns In The Chemistry Of Boron
| Content Provider | Indian Institute of Science (IISc) |
|---|---|
| Author | Jemmis, Eluvathingal D. Prasad, Dasari Lvk |
| Copyright Year | 2008 |
| Abstract | Structural links between benzenoid aromatics and graphite as well as saturated hydrocarbons and diamond are seen in high school text books. A similar understanding is only beginning to emerge in the chemistry of boron. Unlike benzenoid aromatics where the condensation is usually by edge-sharing, there are several ways of condensing polyhedral boranes. These include edge-sharing, triangular face sharing, four atom sharing and a single atom sharing. An electron counting mno rule similar to the Huckel 4n + 2 pi electron counting rule will be presented for mono and condensed polyhedral boranes. Application of this rule shows that the structural details of beta-rhombohedral boron, such as the vacancies and extra occupancies in the unit cell are a consequence of the electronic requirements rather than defects in the structure. While this is the beginning of a general understanding, there is a long way to go before the quantitative details emerge in this area, along with the synthesis and chemistry of a variety of condensed boranes. These ideas also provide a relationship between boron and fullerenes. Further, designing stable boron-rich candidates for physiological applications and materials for use in extreme conditions are areas that are waiting to be explored. |
| File Format | |
| Journal | PeerReviewed |
| Language | English |
| Publisher | Indian Acadamy Of Sciences |
| Publisher Date | 2008-11-10 |
| Access Restriction | Authorized |
| Subject Keyword | Inorganic & Physical Chemistry |
| Content Type | Text |
| Resource Type | Article |
