Acetylide addition [RC≡C(–)]

Acetylide addition (RC≡C‾) Definition:

Alkyl halides treated with acetylide anions will undergo  SN2 reactions to give alkynes.

Acetylide addition (RC≡C‾) Explained:

Acetylide anions are the conjugate base of acetylenes (alkynes), and this is a commercial way to obtained alkynes. This process is only efficient with primary alkyl halides, possibly secondary which can undergo E2 mechanism because of steric hindrance of the leaving group.

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