Question

What type of hybridisation is present in carbocation formed during the alkaline hydrolysis of $1$- bromo-$1$- phenyl ethane ?

• A. $s{p}^2$
• B. $sp$
• C. $d^{2}s{p}^2$
• D. $s{p}^3$

Answer 1

Answer: (A)

Alkaline hydrolysis of $1$ -bromo-$1$-phenylethane produce $1$-phenylethan-$1$-ol. The reaction proceed via $S_{N}1$ reaction. A carbocation is formed in the slow step of an $S_{N}1$ reaction. The positively charged carbon of the carbocation intermediate is $s{p}^2$ - hybridised and the three bonds connected to an $s{p}^2$ - hybridised are in the same plane. Reaction involved is as follows: