Propose another pair of reactants that could be used to prepare 2 -heptyne (the product in Eq. 1

step 1 This is the answer to chapter 24, problem number 65 from the Smith Organic Chemistry textbook. T

Propose another pair of reactants that could be used to...

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Key Concepts

SN2 Reaction Mechanism

The SN2 mechanism is crucial in many carbon–carbon bond-forming reactions, particularly in the context of using acetylide ions as nucleophiles. In this one-step bimolecular substitution, the nucleophile attacks an electrophilic carbon bearing a suitable leaving group (typically in an alkyl halide), resulting in inversion of configuration. This process is efficient for coupling reactions that lead to the formation of internal alkynes.

Acetylide Ion Chemistry

Acetylide ion formation is a cornerstone in alkyne synthesis where a terminal alkyne, due to its relatively acidic hydrogen, is deprotonated by a strong base to form a nucleophilic acetylide. This species is highly reactive and can participate in nucleophilic substitution reactions, effectively forming new carbon–carbon bonds and enabling the construction of more complex alkyne structures.

Double Elimination Reactions

Double elimination reactions involve the sequential loss of two molecules of a small leaving group (often HX) from a substrate such as a dihalide, leading to the formation of a triple bond. This methodology is fundamental in synthesizing alkynes and relies on the use of strong bases to induce consecutive elimination steps, transforming a vicinal or geminal dihalide into an alkyne.

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