Chapter 4, Problem 89AE

Interpretation Introduction

Interpretation: The barrier rotation of carbon-carbon double bond is to be estimated.

Concept introduction: In any molecule, single bonds rotate easily due to head-to-head overlapping of orbitals. But rotation of double bond is restricted. In double bond electron density above and below the plane is very high. This high density cause repulsion between electrons and restrict rotation.

To determine: The given structures are same or not.