Predict the product for each of the following reactions.
(d)

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Identify the functional groups in the reactant. The reactant contains a sulfonate ester group, which is a good leaving group.

Recognize the reagent used in the reaction. KCN (potassium cyanide) is a source of the cyanide ion (CN⁻), which acts as a nucleophile.

Consider the solvent, THF (tetrahydrofuran), which is an aprotic solvent that can facilitate SN2 reactions by stabilizing the transition state.

Predict the mechanism of the reaction. The cyanide ion will perform a nucleophilic attack on the carbon atom bonded to the sulfonate ester, leading to an SN2 substitution reaction.

Determine the stereochemistry of the product. Since the reaction proceeds via an SN2 mechanism, the configuration at the chiral center will be inverted, resulting in the formation of a nitrile with opposite stereochemistry.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Reaction Mechanisms

Understanding reaction mechanisms is crucial in organic chemistry as they describe the step-by-step process by which reactants transform into products. This includes identifying intermediates, transition states, and the movement of electrons. Familiarity with mechanisms helps predict the outcome of reactions and the stability of products formed.

Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. Recognizing functional groups allows chemists to predict reactivity and the types of products that can be formed in a reaction. Common functional groups include alcohols, amines, and carboxylic acids, each influencing the reaction pathway.

Stereochemistry

Stereochemistry involves the study of the spatial arrangement of atoms in molecules and how this affects their chemical behavior. It is essential for predicting the products of reactions, especially in cases where chirality is involved. Understanding stereochemical principles helps in determining whether a reaction will yield a single stereoisomer or a mixture of products.

Predict the product for each of the following reactions.(d)