atom number must be used to indicate the position of each such group. If two or
more of the same group are attached to the same carbon atom, the number of the
carbon atom is repeated. If two or more different substituted groups are in a name,
they are arranged alphabetically.
TIP
Numbers have been added to the longest chain for identification only.Example 1
2,2-dimethylbutane
Example 2
1,1-dichloro-3-ethyl-2,4-dimethylpentane
Example 3
2-iodo-2-methylpropane