Question

The number of structural and configurational isomers of a bromo compound, `C_5H_9Br`, formed by the addition of `HBr` to 2-pentyne respectively, is:
A. (a) 1 and 2
B. (b) 2 and 4
C. (c) 4 and 2
D. (d) 2 and 1

Answer 1

Correct Answer - B

I and III are structural isomers, I and II, III and IV are diastereomers (or four configurational isomers).