Question

Find the IUPAC name of the compound

• A. 1-Methylethyl 2-phenoxyethyl ether
• B. 3-Methylbutyl phenyl ether
• C. 1-Phenoxy-3-methylbutane
• D. 4-Phenoxy-2-methylbutane

Hint:

For ethers, choose the longer carbon chain as the parent hydrocarbon and treat the smaller part attached through oxygen as an alkoxy substituent.

Answer 1

The Correct Option is C

Concept: According to IUPAC nomenclature, ethers are named as alkoxy derivatives of hydrocarbons. The larger carbon chain is selected as the parent chain, while the smaller group attached through oxygen is considered an alkoxy substituent. The given compound contains a phenoxy group attached to a four-carbon chain. \[ \mathrm{C_6H_5OCH_2CH_2CH(CH_3)_2} \] The group \[ \mathrm{C_6H_5O-} \] is called the phenoxy group.

Step 1: Identify the longest carbon chain. The carbon chain attached to oxygen is: \[ CH_2-CH_2-CH(CH_3)-CH_3 \] which corresponds to butane.

Step 2: Locate the substituents. The phenoxy group is attached to carbon-1. The methyl group is attached to carbon-3. Hence, the substituents are: \[ 1\text{-phenoxy} \] and \[ 3\text{-methyl} \]

Step 3: Construct the IUPAC name. Combining the substituents and parent chain: \[ \boxed{\text{1-Phenoxy-3-methylbutane}} \] Therefore, the correct option is \[ \boxed{(C)} \]