Question

How conversion of ethene to but-1-yne can be effected

Answer 1

Answer:

i) Ethanol to but-1-yne : -

ethanol

CH

3

−CH

2

−OH

+SOCl

2

Pyridine

ethyl chloride

CH

3

−CH

2

−Cl

+SO

2

↑+HCl↑

acetylene

HC≡CH

+NaNH

2

liq.NH

3

sodium acetylide

HC≡C

−

Na

+

CH

3

−CH

2

−Cl+HC≡C

−

Na

+

→

but−1−yne

CH

3

−CH

2

−C≡CH

+NaCl

Answer 2

Answer:

Explanation:

CH2=CH2 + Br2 -> CH2Br - CH2Br

CH2Br - CH2Br + alc.KOH -> CH2CHBr

CH2CHBr + NaNH2 -> C2H2

C2H2 + Na -> HCCNa

HCCNa +CH3Br -> HCCCH3( but-1-yne)