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CH 3 – (CH 2 ) 5 – CH 3 Heptane
CH 3 – (CH 2 ) 6 – CH 3 Octane
CH 3 – (CH 2 ) 7 – CH 3 Nonane
CH 3 – (CH 2 ) 8 – CH 3 Decane

For the formation of the names of organic compounds, we will use
the systematic nomenclature (IUPAC). It is based on the names
of alkanes (saturated hydrocarbons). The names of all alkanes
have the suffix -an.
If yousubtract one atom of Hydrogenfrom alkane molecule, then
such part of the molecule is called a radical. The names of the
radicals are derived from the names of the corresponding alkanes
and are formed by replacing the suffix -an with -il, -

СН 3 – methyl С 2Н 5– ethyl

For propyl the formation of such radicals is possible:

CH 3 – CH 2 – CH 2- CH 3 – CH – CH 3

propyle isopropyle

Based on the name of an organic compound, the longest chain of
Carbon atoms is selected and numbered. In such a chain, there
may be substituents - hydrocarbon radicals or functional groups.
The position of the substitute is indicated by Arabic numerals -
locators. The locator corresponds to the Carbon atom number to
which this substituent is connected. If the connection has multiple
bonds, they must also be indicated in the title.
To indicate the location of a multiple bond, indicate the number of
the Carbon atom, after which there is a multiple bond. It is
written before the root name. Locations are not indicated: - if the