Question

The correct IUPAC name of CH\(_3\) - C(CH\(_3\))\(_{2}\) - O - C\(_2\)H\(_5\) is

• A. Tertiary butoxy ethane
• B. 1, 1-Dimethyl-1-ethoxyethane
• C. 2-ethoxy-2-methyl propane
• D. Ethoxy tertiary butane

Hint:

For IUPAC naming of ethers, remember the rule: (Smaller alkyl group as alkoxy substituent) + (Larger alkyl group as parent alkane). Always find the longest continuous carbon chain for the parent alkane.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
The question asks for the correct IUPAC name for the given ether structure. The structure is (CH\(_3\))\(_{3}\)C-O-CH\(_2\)CH\(_3\).
Step 2: Applying IUPAC Rules for Naming Ethers:
Ethers are named as "alkoxyalkanes" according to IUPAC rules.
1. Identify the two alkyl groups attached to the oxygen atom. Here, they are tert-butyl ((CH\(_3\))\(_{3}\)C-) and ethyl (-CH\(_2\)CH\(_3\)).
2. The larger of the two alkyl groups is chosen as the parent alkane. The tert-butyl group is derived from 2-methylpropane (3 carbons in the longest chain), and the ethyl group is derived from ethane (2 carbons). Therefore, the parent alkane is based on the tert-butyl group.
3. The parent alkane is 2-methylpropane. Let's number the chain:

The longest carbon chain has three carbons. So the parent alkane is propane. There is a methyl group at position 2, making it 2-methylpropane.
4. The smaller alkyl group along with the oxygen atom is named as an alkoxy substituent. Here, -O-C\(_2\)H\(_5\) is the ethoxy group.
5. Indicate the position of the alkoxy substituent on the parent chain. The ethoxy group is attached to carbon-2 of the 2-methylpropane chain.
Step 3: Assembling the IUPAC Name:
Combining the parts: - Substituent at C-2: ethoxy - Parent chain: 2-methylpropane The full IUPAC name is 2-ethoxy-2-methylpropane.
Step 4: Final Answer:
The correct IUPAC name is 2-ethoxy-2-methylpropane.