Question

In the given compound the correct lowest set of locants are :

• A. 3,3,4,5
• B. 3,4,5,5
• C. 4,5,3,3
• D. None of these

Answer 1

The correct option is A 3,3,4,5

Locant is the number of the carbon atom on which the substituent is located. Here the longest chain contains 7 carbon atoms.

Now if we start numbering from the left hand side, the numbering sequence will be 3,3,4,5. Total will be (3+3+4+5)=15. If we start from the right hand side then the numbering sequence will be (3+4+5+5)=17. We need the least set of locants So the correct order is 3,3,4,5. Hence the correct option is A