why-alkynide-alkylation-reaction-shown-below-fails-to-yield-the-desired-product-

Question

Why alkynide alkylation reaction shown below fails to yield the desired product? What actual major product would be formed in this reaction?

Accepted Answer

Because the alkyl halide used in this reaction is hindered, an elimination reaction will occur instead of a substitution.

Answer

Because the alkyl halide used in this reaction is hindered, an $$S_{N}1 $$reaction will occur instead of an $$S_{N}2 $$reaction.

Answer

Because of the use of a weak base, alkynide ions will not be formed for the desired substitution.

Answer

Because of the presence of a poor leaving group, a substitution reaction is not possible.