Question

write the equation for the laboratory preparation of:ethylene from1,2,dibromoethane

​

Answer 1

Answer:

Reaction:

CH  

2

​  

Br−CH  

2

​  

Br  

alc.KOH

​  

CH  

2

​  

=CHBr  

NaNH  

2

​  

 

​  

CH≡CH  (ethyne)

In the reaction first β elimination reaction of the alkyl halide takes place to form the corresponding alkene. This alkene on reaction with sodamide forms corresponding alkyne.(As NaNH  

2

​  

 is strong base)