Question

Name the following compounds:

Short answer

The name of the compounds is,

a) 4-bromo-5-ethyl-decan-6-ol

b) 5-chloro-3-ethyl-2,7-dimethyl-nonane

c) 7,7-dimethyl-pentan-3-ol

Step-by-step solution

Rules of IUPAC nomenclature

There are some rules to be followed for the naming of a structure and these are given as follows,

1. Finding the longest chain.
2. Numbering the chain according to the priority order of double bond, triple bond, and functional group.
3. The functional group should be written in alphabetical order means if there is a methyl and an ethyl group, put the ethyl group at first as e comes earlier than m in alphabets.
4. Among two or more functional groups, the name of the compounds will be based on that group that has higher priority.
5. If the numbering of halogen and alkyl groups from each side is the same, priority would be from that direction which has the group with the nearest letter of the A alphabet. For example; If there is butyl and a chloro group, as b comes first then c, the numbering will be from the butyl group.

IUPAC names of the given compounds

The systematic names are given below, using the IUPAC rules. First, the longest chain is considered and the position of the functional group, and then it is written in alphabetical order.

Subpart (a) The name of the compound a. 

The name of the compound is 4-bromo-5-ethyl-decan-6-olas shown below.

Subpart (b) The name of the compound b.

The name of the compound is 5-chloro-3-ethyl-2,7-dimethyl-nonane as shown below.

Subpart (c) The name of the compound c.

The name of the compound is 7,7-dimethyl-pentan-3-olas shown below.