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Elimination Reactions of Alkyl Halides

a Write the e...

Question

a) Write the equations for the steps in $S_{N} 1$ mechanism of the conversion of teri-Butyl bromide into tert-Butyl alcohol.
b) Explain Fitting reaction.
c) Name the reagent used in the dehydrohalogenation of haloalkanes.

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Solution

a) (Ref. image (a))
b) Fittig reaction: In presence of sodium and dry ether, two molecules of aryl halide couple to form diaryl. (Ref. image (b))
c) Alcoholic potassium hydroxide.

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Q. a) Write equations for the steps in

S_{N} 1

mechanism of the conversion of tert. butyl bromide into tert. butyl alcohol.
b) Identify the products

A, B

C

in the following equation

C H_{3} O H R e d P - -- \to C l_{2} A N a I - ----- \to d r y a c e t o n e B C_{6} H_{5} I - -------- \to N a a n d d r y e t h e r C

S N^{1}

mechanism for the hydrolysis of tert-butyl bromide.

Q. a) i) Write the equations for the steps in

S_{N} 1

mechanism of the conversion of tert.butyl bromide into tert.butyl alcohol.
ii) Haloarences are less reactive towards nucleophilic substitution reactions than Haloalkanes. Give a reason.
b) Complete the following equations :
i)

C_{2} H_{5} O H + S O C l_{2} \to . . . . . . . . . . . . . . . . . . . . . . . . . . .

ii) Please find above image.

Q. Arrange the following alkyl chlorides in order of decreasing reactivity in a

S_{N} 1

reaction.
(I) isopropyl bromide
(II) propyl bromide
(III) tert-butyl bromide
(IV) methyl bromide

Q. Explain the mechanism of alkaline hydrolysis of tert-butyl bromide with energy profile diagram.
Define carbolic acid.
How carbolic acid is prepared from benzene sulphonic acid?

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