How do you convert: (i) Chlorobenzene to biphenyl, (ii) ...

CBSE Class 12 Chemistry 2016 Outside Delhi Set 1 Solved Paper

Question : 19

Total: 26

How do you convert:
(i) Chlorobenzene to biphenyl,
(ii) Propene to 1-iodopropane,
(iii) 2-bromobutane to but-2-ene.
OR
Write the major product (s) in the following:
(i)

(ii) 2CH3−

−CH3

─────▸

‌ dry ether ‌

?
(iii) CH3−CH2−Br‌ ‌

AgCN

─────▸

Solution:

(i)

(ii) CH3‌CH=CH2

HBr∕‌ peroxide ‌

─────▸

CH3CH2CH2‌Br‌ ‌

‌ Nal / acetone ‌

─────▸

CH3CH2CH2I
(iii) CH3CH2

CH3

‌ Alc.KOH ‌

─────▸

CH3‌CH=CH‌CH3
OR(i)

(ii) CH3−

CH3

−

CH3

−CH3
(iii) CH3CH2‌NC

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