2,3-Dimethylpentane

2,3-Dimethylpentane
Skeletal formula of 2,3-dimethylpentane
Names
Preferred IUPAC name
2,3-Dimethylpentane
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.008.437 Edit this at Wikidata
EC Number
  • (racemic): 209-280-0
UNII
UN number 1206
  • InChI=1S/C7H16/c1-5-7(4)6(2)3/h6-7H,5H2,1-4H3/t7-/m0/s1 checkY
    Key: WGECXQBGLLYSFP-UHFFFAOYSA-N checkY
  • (racemic): CCC(C)C(C)C
Properties
C7H16
Molar mass 100.205 g·mol−1
Appearance Colourless liquid
Density 0.7076 g/mL (25 °C), 0.6413 (80 °C), 0.7380 (25 °C, 45 MPa), 0.6891 (80 °C, 45 MPa) (racemic)[1]
Boiling point 89.7 °C (racemic)[2][3][4]
Vapor pressure 2.35 psi (37.7 °C)[5]
Viscosity 0.356 mPa s (30 °C), 0.232 (80 °C), 0.624 (30 °C, 60 MPa) (racemic)[1]
Thermochemistry
34.308 cal/K/mol (−189 °C), 51.647 (20 °C), 58.735 (86.6 °C) (racemic)[6]
71.02 cal/K/mol (25 °C) (racemic)[6]
Hazards
GHS labelling:
GHS02: Flammable GHS07: Exclamation mark GHS08: Health hazard GHS09: Environmental hazard
Danger
H225, H304, H315, H335, H336, H410
P210, P233, P240, P241, P242, P243, P261, P264, P271, P273, P280, P301+P310, P302+P352, P303+P361+P353, P304+P340, P312, P321, P331, P332+P313, P362, P370+P378, P391, P403+P233, P403+P235, P405, P501
Flash point −7 °C (19 °F; 266 K)[5]
337 °C (639 °F; 610 K)[5]
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

2,3-Dimethylpentane is an organic compound of carbon and hydrogen with formula C
7H
16, more precisely CH
3–CH(CH
3)–CH(CH
3)–CH
2–CH
3: a molecule of pentane with methyl groups –CH
3 replacing hydrogen atoms on carbon atoms 2 and 3. It is an alkane ("paraffin" in older nomenclature), a fully saturated hydrocarbon; specifically, one of the isomers of heptane.

Like typical alkanes, it is a colorless flammable compound; under common ambient conditions, it is a mobile liquid, less dense than water.[1]

2,3-Dimethylpentane is notable for being one of the two simplest alkanes with optical (enantiomeric) isomerism. The optical center is the middle carbon of the pentane backbone, which is connected to one hydrogen atom, one methyl group, one ethyl group –C
2H
5, and one isopropyl group –CH(CH
3)
2. The two enantiomers are denoted (3R)-2,3-dimethylpentane and (3S)-2,3-dimethylpentane (the other simplest chiral alkane is its structural isomer 3-methylhexane).

  1. ^ a b c Alfonso S. Pensado, María J. P. Comuñas, Luis Lugo, and Josefa Fernández (2005): "Experimental Dynamic Viscosities of 2,3-Dimethylpentane up to 60 MPa and from (303.15 to 353.15) K Using a Rolling-Ball Viscometer". Journal of Chemical & Engineering Data, volume 50, issue 3, pages 849–855. doi:10.1021/je049662k
  2. ^ Cite error: The named reference nist was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference wiener was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference edgar was invoked but never defined (see the help page).
  5. ^ a b c Sigma Aldrich: 2,3-Dimethylpentane catalog entry. Accessed on 2018-11-06.
  6. ^ a b Cite error: The named reference finke was invoked but never defined (see the help page).