Pentane Formula

Pentane is an organic compound which is a clear colourless liquid. The odour of pentane is similar to petroleum. It is less dense than the water and is insoluble in water. It is also known as quintane and n-pentane. The rotatable bond count of pentane is 2.

Following is the table of formulas of pentane:

Molecular formula C5H12
Linear formula CH3(CH2)3CH3
The Simplified molecular-input line-entry system (SMILES) CCCCC

Structure Of Pentane

Pentane Formula

The structure of pentane is a straight-chain with 5 carbon atoms.

Properties Of Pentane

The properties of pentane are similar to butane and hexane. Following is the table of properties of pentane:

IUPAC name pentane
Molecular formula C5H12
Molecular mass 72.151 g/mol
Melting point -130.5 to -129.1℃
Boiling point 35.9 to 36.3℃
Density 0.626 g/mL
Appearance Colourless liquid
Refractive index 1.358
Viscosity 0.240 mPa.s at 20℃

Isomers Of Pentane

There are three structural isomers of pentane and they are:

  • n-pentane is the first isomer which is a straight chain with a normal structure of pentane.
  • 2-methylbutane is the second isomer which is a branched-chain structure in which one carbon atom is connected to three other carbon atoms.
  • 2,2-dimethylpropane is the third isomer which is a branched-chain structure in the central carbon atom is connected to four other carbon atoms.

Uses Of Pentane

  • It is used in the production of polystyrene foam.
  • Isopentane which is obtained by acid-catalysed isomerisation is used in producing high-octane fuels.
  • It is used in geothermal power stations as a working medium in Rankine cycle.
  • It is also used in liquid chromatography.
  • At room temperature, pentanes are volatile liquid and inexpensive. They are used as a laboratory solvent.

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