Question

Reaction of ammoniacal cuprous chloride with acetylene

Answer 1

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Answer 2

Hey dear,

● Answer -
Reaction of ammoniacal cuprous chloride with acetylene gives but-1,3-yne.

● Glaser coupling -
- Glaser coupling is identification test for terminal alkynes.
- In this reaction, an terminal alkyne reacts with ammoniacal cupric chloride which on subsequent oxidation in air gives diyne.

- For example, in presence of ammoniacal cuprous chloride, acetylene couples with itself to give but-1,3-yne (red brown ppt).

2 CH≡CH ---> CH≡C-C≡CH
*Reactant : Acetylene
Reagent : Ammoniacal cuprous chloride
Product : But-1,3-yne

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