Question

What is the sum of position assigned to bromine while numbering the parent chain in the below compounds?

• A. 13
• B. 14
• C. 15
• D. 16

Answer 1

The correct option is C 15

In compound I, double bond takes maximum preference and hence when we number it, we can assign the number 6 to the carbon atom with Br.
In compound II, double bond takes maximum preference and hence when we number it, we can assign the number 3 to the carbon atom with Br.
In compound III, double bond takes maximum preference and hence when we number it, we can assign the number 1 to the carbon atom with Br.
In compound IV, double bond takes maximum preference and hence when we number it, we can assign the number 5 to the carbon atom with Br.
When we add all these locants, we get 15.