2,2-Dimethylbutane

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2,2-Dimethylbutane
Stereo, skeletal formula of 2,2-dimethylbutane with some implicit hydrogens shown
Neohexane molecule Neohexane molecule
Identifiers
CAS number 75-83-2 YesY
PubChem 6403
ChemSpider 6163 YesY
EC number 1730736
UN number 1208
ChEMBL CHEMBL142735 YesY
Beilstein Reference 1730736
Jmol-3D images Image 1
Properties
Molecular formula C6H14
Molar mass 86.18 g mol−1
Appearance Colorless liquid
Odor Odorless
Density 649 mg mL−1
Melting point −102 to −98 °C; −152 to −145 °F; 171 to 175 K
Boiling point 49.7 to 49.9 °C; 121.4 to 121.7 °F; 322.8 to 323.0 K
log P 3.51
Vapor pressure 36.88 kPa (at 20 °C)
kH 6.5 nmol Pa−1 kg−1
Refractive index (nD) 1.369
Thermochemistry
Specific
heat capacity
C
189.67 J K−1 mol−1
Std molar
entropy
So298
272.00 J K−1 mol−1
Std enthalpy of
formation
ΔfHo298
−214.4–−212.4 kJ mol−1
Std enthalpy of
combustion
ΔcHo298
−4.1494–−4.1476 MJ mol−1
Hazards
GHS pictograms The flame pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) The health hazard pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) The environment pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)
GHS signal word DANGER
GHS hazard statements H225, H304, H315, H336, H411
GHS precautionary statements P210, P261, P273, P301+310, P331
EU Index 601-007-00-7
EU classification Highly Flammable F Harmful Xn Dangerous for the Environment (Nature) N
R-phrases R11, R38, R51/53, R65, R67
S-phrases (S2), S16, S29, S33
NFPA 704
Flammability code 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g., gasoline) Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point −29 °C (−20 °F; 244 K)
Explosive limits 1.2–7.7%
Related compounds
Related alkanes
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

2,2-Dimethylbutane, trivially known as neohexane, is an organic compound with formula C6H14 or (H3C-)3-C-CH2-CH3. It is therefore an alkane, indeed the most compact and branched of the hexane isomers — the only one with a quaternary carbon and a butane (C4) backbone.

See also[edit]

References[edit]

  1. ^ "2,2-DIMETHYLBUTANE - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. Retrieved 9 March 2012. 
  2. ^ Haynes, William M. (2010). Handbook of Chemistry and Physics (91 ed.). Boca Raton, Florida: CRC Press. p. 3-194. ISBN 978-1439820773.