Chapter 23, Problem 51PP

Interpretation Introduction

Interpretation:

The structures for compounds 1, 2 and 3 in the given reactions and also the reason why compound A give one product whereas compound B gives two products should be identified.

Concept Introduction:

Grubbs catalyst: This catalyst is used to achieve alkene metathesis. It contain transition metal namely $\text{Ru}$ which is doubly bonded with carbon atom.

  

Reaction of an alkene with Grubbs, the vinyl positions in given alkene is separated from each other and finally fragments are recombined. The reaction is as follows,

    

Dienes in presence of dilute solution, alkene metathesis serve as method of ring formation.

  

Alkene metathesis: It involves two stages first; the starting material in presence of catalyst forms two possible intermediates.  Next the intermediates react with the starting material and results to form product.