JEE PYQ: Haloalkanes And Haloarenes Question 23
Question 23 - 2019 (10 Jan Shift 1)
The major product of the following reaction is:
A compound with two Br atoms on adjacent carbons and a Ph group $\xrightarrow{\text{KOH alc (excess)}/\Delta}$
(1) Ph-CH=CH-CH=CH-CH=CH-CH$_3$ (conjugated diene)
(2) A different diene
(3) Conjugated triene with Ph
(4) Ph-CH=CH-CH$_2$-CH=CH-CH$_2$CH$_3$
Show Answer
Answer: (1)
Solution
Dehydrohalogenation ($\beta$-elimination) occurs with KOH alc. (excess) to give conjugated and more substituted alkene.
BETA
