Question

The total number of acyclic isomers (including stereoisomers) of C₄H₇Cl are

(a) 12

(b) 13

(c) 10

(d) 9

Answer 1

Correct option is (a) 12

For writing the various isomers, first write down the structural isomeric compounds of the parent hydrocarbon, C₄H₈ (butene) which are three in number

Now derive various possible monochloro isomers of the three.

Remember that the compound C₄H₇Cl can also exist in the following three cyclic isomeric forms.