MHT CET · Chemistry · Hydrocarbons

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

A $S P^{2}$
B $S P$
C $d^{2} S P^{3}$
D $S P^{3}$

Verified Solution

Answer & Solution

Correct Answer

(A) $S P^{2}$

Step-by-step Solution

Detailed explanation

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 to an

S P^{2} -

hybridised are in the same plane. Reaction involved is as follows:

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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