Answer Key on last page Chapter 27: Pericyclic Reactions 1. Which of the following statements about pericyclic reactions is true? A) Pericyclic reactions occur by way of ionic intermediates. B) Pe ricyclic reactions occur by way of radical intermediates. C) Pericyclic reactions involve multiple steps. D) Reactive intermediates are not formed in pericyclic reactions. 2. Which of the following statements about pericyclic reactions is true? A) In pericyclic reactions, bonds are broken and formed in...

The impact of how orbitals interact on reactivity is introduced before looking at orbital interaction in different reaction types and the effect on transition states. Rearrangement reactions of hydroboration, Baeyer-Villiger reaction, Beckmann rearrangement and Pinacol reaction are given. Effect of orbital interactions on conformation is explored through ethane and anomeric effect on 6-membered rings and the consequences of it. The Diels-Alder reaction is introduced and explored through its sele...

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Pericyclic reactions. The material covered in this section includes (i) analysis of electrocyclic reactions, (ii) cycloaddition reactions and (iii) sigmatropic rearrangements by both a frontier orbital approach and by application of Woodward-Hoffmann rules.