2,3,4,5,6,7,8,9,10,11,12-Undekachlor-1-carba-closo-dodecaboran (12) (the journalistic name is Carboranoic acid ) is one of the strongest acids [1] ( super acid ) obtained at the beginning of the 21st century.
| Carboranic acid | |
|---|---|
 | |
| General | |
| Systematic name | 2,3,4,5,6,7,8,9,10,11,12-undeachlor-1-carba-closo-dodecaboran (12) |
| Chem. formula | H (CHB 11 Cl 11 ) |
The chemical formula is H (CHB 11 Cl 11 ). The carboran part of the molecule has an icosahedral structure.
Content
- 1 Receiving
- 2 Properties
- 3 Acid History
- 4 See also
- 5 notes
- 6 References
Getting
Obtained by the reaction of 1-triethylsilyl-2,3,4,5,6,7,8,9,10,11,12-undechlor-1-carba-closo-dodecaborane (12) with gaseous hydrogen chloride.
Properties
Colorless strongly hygroscopic crystalline substance. It can be distilled in high vacuum. With water and air moisture forms a hydroxonium salt. Does not affect glass. As a strong acid, it can act on the skin, but its sodium salt is low toxic. As a strong acid, it can react with metals to produce hydrogen to form salts and release hydrogen.
Carboranic acid is about a million times stronger than concentrated sulfuric acid . In ordinary scales, the strength of the acid cannot be measured, since the acid protonates all known weak bases and all solvents in which it dissolves.
Protonates benzene, giving a stable benzene salt. Protonates fullerene-60, sulfur dioxide.
At the moment, the strongest known acid that can be stored in the laboratory is fluorinated carboranic acid .
Acid History
The acid was created at the University of California ( USA ) with the participation of employees of the Institute of Catalysis SB RAS ( Novosibirsk ) [2] . The idea of synthesizing carboranoic acid was born from fantasies “about molecules never before created,” said Christopher Reed, one of its creators, in an interview with Nature News.
See also
- Carboranes
Notes
- ↑ The Structure of the Strongest Bronsted Acid: The Carborane Acid H (CHB 11 Cl 11 ) // Journal of the American Chemical Society. - 2006. - No. 128 (10). - SS. 3160-3161.
- ↑ The strongest acid has been created // Science and Life. - 2005. - No. 7. - 2005.