Acetylene reacts with HCN in the presence of Ba(CN)_2 to yield [UP SEE 2004]

JEE Main Chemistry question

Acetylene reacts with HCN in the presence of Ba(CN) to yield [UP SEE 2004]

(A)1,1-dicyanoethane
(B)1,2-dicyanoethane
(C)Vinyl cyanideCorrect
(D)None of these

Answer: (C)

Solution

This is an electrophilic/nucleophilic addition of H–CN across the triple bond of acetylene (catalysed by a mercury- or barium-cyanide salt): HCCH + HCN →

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Question ID VK-142241