The reason for anti-coplanar transition state of ethyl bromide being more favored over syn coplanar is to be explained by showing the Newman projection formulas. Concept introduction: Staggered conformation: It is the arrangement of atoms or groups of atoms in a molecule resulting in a 60 ∘ dihedral angle. It is also called anti-coplanar transition. It has low potential energy because of less torsional strain, and hence, more stable. Eclipsed conformation: It is the arrangement of atoms or groups of atoms in a molecule resulting in a 0 ∘ dihedral angle. It is also called syn-planar transition. It has high potential energy because of high torsional strain, and hence, less stable.

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Chapter 7, Problem 9PP

Interpretation Introduction

Interpretation:

The reason for anti-coplanar transition state of ethyl bromide being more favored over syn coplanar is to be explained by showing the Newman projection formulas.

Concept introduction:

Staggered conformation: It is the arrangement of atoms or groups of atoms in a molecule resulting in a 60∘ dihedral angle. It is also called anti-coplanar transition. It has low potential energy because of less torsional strain, and hence, more stable.

Eclipsed conformation: It is the arrangement of atoms or groups of atoms in a molecule resulting in a 0∘ dihedral angle. It is also called syn-planar transition. It has high potential energy because of high torsional strain, and hence, less stable.

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