Question

Choose the correct IUPAC nameof the following structure:

• A. 2,2,3-trimethylhexane
• B. 3,3,4-trimethylhexane
• C. 2,2 dimethyl 3 propane
• D. 2-tertbutane

Answer 1

The correct option is A 2,2,3-trimethylhexane



The longest continuous carbon chain in the molecule has 6 C atoms and this chain is called the parent/ main/principal chain.
The branched carbon atoms get the lowest possible number. So 2,2,3 is the correct numbering for these substituents .

If the same substituent occurs more than once in the molecule, then prefix di (for two), tri (for three), tetra(for four) are used to indicate how many times it appears.
Here methyl group occurs three times, so tri prefix is used.

So, the correct IUPAC name of the above compound is 2,2,3-trimethylhexane