Tetramethylbutane
Tetramethylbutane | |
---|---|
Skeletal formula of tetramethylbutane | |
Spacefill model of tetramethylbutane | |
2,2,3,3-Tetramethylbutane[1] | |
Identifiers | |
CAS number | 594-82-1 7px |
PubChem | 11675 |
ChemSpider | 11185 7px |
EC number | 209-855-6 |
UN number | 1325 |
Jmol-3D images | Image 1 |
| |
Molecular formula | C8H18 |
Molar mass | 114.23 g mol−1 |
Thermochemistry | |
Std enthalpy of formation ΔfH |
−270.3–−267.9 kJ mol−1 |
Std enthalpy of combustion ΔcH |
−5.4526–−5.4504 MJ mol−1 |
Standard molar entropy S |
273.76 J K−1 mol−1 |
Specific heat capacity, C | 232.2 J K−1 mol−1 (at 2.8 °C) |
Hazards | |
EU Index | 601-009-00-8 |
EU classification | Flammable F Harmful Xn Dangerous for the Environment (Nature) N |
R-phrases | R11, R38, R65, R67, R50/53 |
S-phrases | (S2), S16, S29, S33 |
Flash point | 4 °C |
Explosive limits | 1–?% |
Related compounds | |
Related alkanes | |
14px (verify) (what is: 10px /10px ?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
Infobox references |
Tetramethylbutane, sometimes called hexamethylethane, is a hydrocarbon with formula C8H18 or (H3C-)3C-C(-CH3)3. It is the most heavily branched and most compact of the many octane isomers, the only one with a butane (C4) backbone.
The compound can be obtained by reaction of Grignard reagent tert-butylmagnesium bromide with ethyl bromide, or of ethylmagnesium bromide with tert-butyl bromide in the presence of manganese(II) ions.[2] This transformation is believed to go through the dimerization of two tert-butyl radicals, which are generated by decomposition of the organomanganese compounds generated in situ.
The full IUPAC name of the compound is 2,2,3,3-tetramethylbutane, but the numbers are superfluous in this case because there is no other possible arrangement of "tetramethylbutane".
References
- ↑ "Hexamethylethane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Information. http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=11675&loc=ec_rcs. Retrieved 11 March 2012.
- ↑ Script error
es:Tetrametilbutano fa:تترامتیلبوتان fr:2,2,3,3-tétraméthylbutane nl:Tetramethylbutaan