Question

organic chemistry
maxwell
select the correct iupac name for the branched chain alkane.
the name is:
3,5 - dimethyl - 7 - (2 - methylpropyl)tridecane
2 - methyl - 4 - (2,3 - dimethylpentyl)decane
2 - ethyl - 4 - methyl - 6 - (2 - methylpropyl)dodecane
9,11 - dimethyl - 7 - (1 - methypropyl)tridecane

Explanation:

Step1: Identify longest carbon chain

Count the longest continuous chain: it has 13 carbons, so parent chain is tridecane.

Step2: Number the chain from closest end

Number from the left to get lowest substituent positions: substituents at 3, 5, 7.

Step3: Name substituents

• C3: methyl ($-\text{CH}_3$)
• C5: methyl ($-\text{CH}_3$)
• C7: 2-methylpropyl (branched 3-carbon chain)

Step4: Assemble IUPAC name

List substituents in alphabetical order, with positions.

Answer:

3,5-dimethyl-7-(2-methylpropyl)tridecane