Chapter 6.11, Problem 18ATS

Interpretation Introduction

Interpretation:

Migration of the methylene group in each step in the given reaction has to be drawn using curved arrows.

Concept Introduction:

Mechanism of the reaction is the step-by-step description of the process by which reactants are changed into products.

Curved arrows show the bonds that are formed and the bonds that are broken in a reaction.

Curved arrows used to understand a reaction mechanism.

Curved arrows are drawn to show how the electrons move as new covalent bonds are formed existing covalent bonds are broken.

Each arrow represents the simultaneous movement of two electrons from a nucleophile towards an electrophile.

Rearrangements will always occur when an alkyl group or hydrogen can shift to form a more stable carbocation. There are mainly two types of rearrangement shifts and they are,

$\begin{array}{l}\text{1, 2-methyl shift}\hfill \\ \text{1, 2-hydride shift}\hfill \end{array}$