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The octane is a Hydrocarbure saturated with the family of the Alcane S. It has 8 Atome S of Carbone (C) and 18 atoms of Hydrogène (H). There exists in the form of 18 Isomère S.

Chemical formula

Empirical formula:

Formulate developed plane: one can allot 18 formulas developed with the preceding empirical formula, but the structure of linear octane ( N - octane) is:

H H H H H H H H
| | | | | | | |
H - C - C - C - C - C - C - C - C - H | | | | | | | |
H H H H H H H H

or CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH3

Applications

It is the principal compound of the gasoline, and is the molecule of reference of the reaction of combustion of the engines to “gasoline”. The simplified formula of the reaction of combustion of octane is: 25/2 + → 8 + 9

or with integers: 2 + 25 → 16 + 18

To define the Number octane, the 2-2-4 triméthyl pentane is used, which is an iso-octane.

See too

  • Number octane

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