What isa the UIPAC name H3C
CH2-CH2-CH3
CH-CH-CH2-CH3
H3C—CH
CH
CH3

4–ethyl–2,3–dimethylheptane

Explanation:

To name the compound given above, do the following:

1. Locate the longest continuous carbon chain. This gives the parent name of the compound. In this case, the longest continuous carbon chain is 7. Thus the parent name is Heptane.

2. Identify the substituent group attached to the compound. In this case, the substituent group attached are:

a. Methyl (–CH₃). There are two methyl group attached.

b. Ethyl (–CH₂CH₃)

3. Locate the position of the substituent group attached to the compound by naming alphabetically.

a. The two Methyl (–CH₃) groups are located at carbon 2 and 3

b. The Ethyl (–CH₂CH₃) is located at carbon 4.

NOTE: The position of the Ethyl (–CH₂CH₃) group is the same from both side so we consider the lowest count for the methyl group.

4. Combine the above to obtain the name of the compound.

The name of the compound is:

4–ethyl–2,3–dimethylheptane