Chapter 11, Problem 11.66AP

Interpretation Introduction

(a)

Interpretation:

The curved-arrow mechanism for the formation of double sulfonium salt is to be stated.

Concept introduction:

The nucleophilic substitution reactions are the reactions in which a group is substituted by an incoming nucleophile. The rate of reaction depends upon the nucleophilicity and concentration of the incoming nucleophile.

The ${\text{S}}_{\text{N}}\text{2}$ reaction is a nucleophilic substitution bimolecular reaction in which the addition of incoming nucleophile and elimination of a leaving group takes place simultaneously. The rate of reaction depends upon both the substrate and reactant in the rate law equation.

Interpretation Introduction

(b)

Interpretation:

An explanation as to why two isomers of the compounds are formed having different melting point is to be stated. The stereochemical relationship between the isomers is to be stated.

Concept introduction:

The diastereomeric compounds have different physical properties like melting point and boiling point. The sulfonium salts having the chiral center at the sulfur atom undergo slow interconversions from one configuration to the other like amines.