{{#if:OdourlessOdourlessWhite, opaque, waxy crystals2.9 nmol Pa−1 kg−1371377188|! style="background: #F8EABA; text-align: center;" colspan="2" | Properties
Tetramethylbutane
Skeletal formula of tetramethylbutane
Spacefill model of tetramethylbutane
Identifiers
CAS number 594-82-1 7pxY
PubChem 11675
ChemSpider 11185 7pxY
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
ΔfHo298
−270.3–−267.9 kJ mol−1
Std enthalpy of
combustion
ΔcHo298
−5.4526–−5.4504 MJ mol−1
Standard molar
entropy
So298
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
 14pxY (verify) (what is: 10pxY/10pxN?)
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

  1. "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.
  2. Script error
de:Tetramethylbutan

es:Tetrametilbutano fa:تترامتیل‌بوتان fr:2,2,3,3-tétraméthylbutane nl:Tetramethylbutaan