Question

In carbinol system, sec-Butyl alcohol is named as ______.

• A. Ethyl methyl carbinol
• B. sec-Butylcarbinol
• C. Isopropyl carbinol
• D. Diethylcarbinol

Hint:

Always isolate the $C-OH$ core (the "carbinol" group) and mentally mask it. Whatever alkyl branches are sticking out of it become the prefix of your name.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
In the carbinol system, methyl alcohol ($CH_3OH$) is taken as the parent compound (carbinol). Other alcohols are named as alkyl-substituted derivatives of carbinol.

Step 2: Formula Application:
Identify the groups attached to the $C-OH$ carbon in sec-Butyl alcohol ($CH_3-CH(OH)-CH_2-CH_3$).

Step 3: Explanation:
In sec-Butyl alcohol, the central carbon (carbinol carbon) is attached to one methyl group ($-CH_3$) and one ethyl group ($-CH_2CH_3$). Therefore, in the carbinol naming convention, it is called Ethyl methyl carbinol.

Step 4: Final Answer:
The name is Ethyl methyl carbinol.