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2,2-Dimethylbutane

2,2-Dimethylbutane
Stereo, skeletal formula of 2,2-dimethylbutane with some implicit hydrogens shown
Neohexane molecule
Neohexane molecule
Names
IUPAC name
2,2-Dimethylbutane
Other names
Neohexane, 22DMB
Identifiers
75-83-2 YesY
3D model (Jmol) Interactive image
1730736
ChEMBL ChEMBL142735 YesY
ChemSpider 6163 YesY
ECHA InfoCard 100.000.825
EC Number 200-906-8
PubChem 6403
RTECS number EJ9300000
UNII 07L56L3MP2 N
UN number 1208
Properties
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)
6.5 nmol Pa−1 kg−1
-76.24·10−6 cm3/mol
1.369
Thermochemistry
189.67 J K−1 mol−1
272.00 J K−1 mol−1
−214.4–−212.4 kJ mol−1
−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
H225, H304, H315, H336, H411
P210, P261, P273, P301+310, P331
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)
425 °C (797 °F; 698 K)
Explosive limits 1.2–7.7%
US health exposure limits (NIOSH):
PEL (Permissible)
 none
Related compounds
Related alkanes
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YesYN ?)
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. It can be synthesised by the hydroisomerisation of 2,3-dimethylbutane using an acid catalyst.



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