Chapter 6, Problem 6.53SP

Interpretation Introduction

Interpretation: The transfer of an ethyl group by triethyloxonium tetrafluoroborate to a nucleophile in a ${\text{S}}_{\text{N}}2$ reaction and the leaving group is to be predicted. The reason corresponding to fact that this reagent prefers the usage of an ethyl halide is to be stated.

Concept introduction: The replacement or substitution of one functional group with another different functional group in any chemical reaction is termed as substitution reaction. There are two types of substitution reaction.

The nucleophilic reaction contains a substrate as well as a nucleophile as the reactants which mean a bimolecular nucleophilic reaction is termed as ${\text{S}}_{\text{N}}\text{2}$ reaction. It includes the bond-making and bond-breaking steps. This is a one-step reaction in which both nucleophile and substrate participate in the rate determining step.

The ${\text{S}}_{\text{N}}2$ reactions depend upon the rear-side attack of a strong nucleophile over the less sterically hindered electrophile that contains a good leaving group.

To determine: A mechanism for the transfer of an ethyl group by triethyloxonium tetrafluoroborate to a nucleophile in a ${\text{S}}_{\text{N}}2$ reaction and the leaving group and the reason corresponding to the fact that this reagent prefers the usage of an ethyl halide.