Question

Draw the major product for each of the following reactions, showing the correct stereochemistry, if any, (Include H's, with stereobonds, on chirality centers.) .

Answer 1

Concepts and reason

The reaction in which electron rich (nucleophile) reacts with an electron deficient (electrophile) by replacing the leaving group is represented as Nucleophilic substitution reaction. ${{\rm{S}}_{\rm{N}}}{\rm{1}}\,\,{\rm{and}}\,\,{{\rm{S}}_{\rm{N}}}{\rm{2}}$ are the two types of Nucleophilic substitution reactions.

Fundamentals

${{\rm{S}}_{\rm{N}}}{\rm{1}}$ reaction:

It is unimolecular reaction. The reaction takes place in two steps. The carbocation intermediate formed in the first step at the most stable site and the product formed in the second step. According to stereochemistry, the mixture of inversion and retention configuration occurs.

${{\rm{S}}_{\rm{N}}}2$ reaction:

It is a bimolecular reaction. The addition of nucleophile and cleavage of a leaving group occurs in the same step. In this reaction, the nucleophile attacks from the backside. Therefore, the inversion of configuration occurs.

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