Question

What is the IUPAC name for the compound shown below? Spelling and punctuation count!

Answer 1

Concepts and reason

IUPAC stands for the international union of pure and applied chemistry. IUPAC has given a nomenclature to name the organic compounds. The IUPAC name consists of three parts: root name, prefix, and suffix.

Fundamentals

The three parts of an IUPAC name are the root name, prefix, and suffix. The longest chain gives the root name. Prefix gives the position and name of the substitutions present on the longest chain. Suffix gives the functional group present in the structure.

 

The given structure of the compound is shown below.

The longest chain is indicated by the numbers. The root name is hex.

The longest chain has six carbon atoms. So, the root name for the given structure is hex. Select the longest chain such that, the substituents have the lowest numbers.

 

Three substituents are present on the longest chain. They are two methyl groups and one ethyl group.

The prefix is 3-ethyl-2,2-dimethyl.

Two methyl groups are substituted at C-2 carbon and one ethyl group is substituted at C-3 carbon. So, the prefix is 3-ethyl-2,2-dimethyl. [Common mistake] Make sure that the substituents are named in alphabetical order.

The suffix is ane.

Thus, the IUPAC name of the given structure is 3-ethyl- 2,2 -dimethylhexane.