Question

The IUPAC name of is

[2007]

• A. 3-ethyl-4,4-dimethylheptane
• B. 1,1-diethyl-2,2-dimethylpentane
• C. 4,4-dimethyl-5,5-diethylpentane
• D. 5, 5-diethyl-4, 4-dimethylpentane

Answer 1

The correct option is A 3-ethyl-4,4-dimethylheptane

3-ethyl-4,4-dimethylheptane

Let's follow standard procedure.

First identify the longest chain. If you do so, you will see that we have a 7-carbon chain. So, hept

Then you can see that there are 2 methyl groups and 1 ethyl group as the substituents.

Once you find the substituents we need to assign numbers.

What do you think? 3-ethyl-4,4-dimethylheptane is fine right?

Remember the lowest locant rule.