The reason for the statement that the hydrogen migration reaction (1) occurs readily but similar migration reaction (2) is not feasible even under forcing conditions is to be stated. Concept introduction: Sigmatropic rearrangements are pericyclic reactions which take place by the concerted mechanism. In these rearrangements migration of sigma bond takes place. The hydrogen migration from one terminal group to another terminal group is a type of sigmatropic rearrangements.

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Chapter 28, Problem 28.16P

Interpretation Introduction

Interpretation:

The reason for the statement that the hydrogen migration reaction (1) occurs readily but similar migration reaction (2) is not feasible even under forcing conditions is to be stated.

Concept introduction:

Sigmatropic rearrangements are pericyclic reactions which take place by the concerted mechanism. In these rearrangements migration of sigma bond takes place. The hydrogen migration from one terminal group to another terminal group is a type of sigmatropic rearrangements.

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