Q.
The total number of alkenes possible by dehydrobromination
of 3-bromo-3-cyclopentylhexane using alcoholic KOH is
2176
182
IIT JEEIIT JEE 2011Haloalkanes and Haloarenes
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Answer: 5
Solution:
The substrate has three different types of B−H, therefore, first three structural isomers of alkenes are expected as :
The last two alkenes II and III are also capable of showing geometrical isomerism, hence two geometrical isomers for each of them will be counted giving a total of five isomers.