Chapter 9, Problem 9.37P

Interpretation Introduction

(a)

Interpretation:

The organic product formed by the reaction of $\left(Z\right)$-$3$-methyl-$2$-pentene with ${\text{CH}}_{\text{2}}{\text{I}}_{\text{2}}$ in the presence of $\text{Zn-Cu}$ couple is to be predicted.

Concept introduction:

Alkenes on reaction with di-iodomethane in the presence of zinc-copper couple give norcarane. The $\text{C}=\text{C}$ bond of alkene breaks and a single three membered cyclic ring is formed. Methylene $\left({\text{:CH}}_{\text{2}}\right)$ is formed as a reactive intermediate during this reaction.

Interpretation Introduction

(b)

Interpretation:

The organic product formed by the reaction of ethylidenecyclobutane with ${\text{CH}}_{\text{2}}{\text{I}}_{\text{2}}$ in the presence of $\text{Zn-Cu}$ couple is to be predicted.

Concept introduction:

Alkenes on reaction with diiodomethane in the presence of zinc-copper couple give norcarane. The $\text{C}=\text{C}$ bond of alkene breaks and a single three membered cyclic ring is formed. Methylene $\left({\text{:CH}}_{\text{2}}\right)$ is formed as a reactive intermediate during this reaction.