Ethane to bromoethane

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Solution

Conversion of Ethane to bromoethene
Ethane reacts with bromine to give bromoethane which reacts with KOH(alcoholic) to form ethane. Ethenereacts with HBr in the presence of CCl4 to give 1,2-dibromoethane which reacts with KOH(alcoholic) to give bromo ethane.

CH3-CH3 + Br2 ---> CH3CH2Br + KOH(alc)-----> CH2=CH2 + HBr

Ethane bromoethane ethene

CH2=CH2 + 2HBr(in presence of CCl4)-----> CH2Br-CH2Br

Ethene 1,2-dibromoethane

CH2Br-CH2Br + KOH(alc)-----> CH2=CHBr + HBr

1,2-dibromoethane bromoethene

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How will you bring about the following conversions ?

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(ii) Ethane to bromoethane

(iii) Propene to 1 - nitropropane

(iv) Toluene to benzyl alcohol

(v) Propene to propyne

(vi) Ethanol to ethyl fluoride

(vii) Bromomethane to propanone

(viii) But-1-ene to but-2-ene

(ix) l - chlorobutane to n- octane

(x) Benzene to biphenyl

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