Chapter 9, Problem 60QP

Interpretation Introduction

Interpretation:

The reason that a delocalized molecular orbital differs from a molecular orbital in ${\text{H}}_{\text{2}}$

or ${\text{C}}_{\text{2}}{\text{H}}_{\text{4}}$, and the minimum conditions for the formation of a delocalized molecular orbital are to be explained.

Concept introduction:

Resonance is the movement of electron pairs from one atom to the adjacent atom or bond resulting in two or more lewis structures.

Delocalized pi bonds are the pi bonds that are shared by more than two atoms.

Delocalized molecular orbitals are formed by the overlap of $p$

orbitals of more than two atoms.

The electron clouds of molecular orbitals extend around the nuclei of bonded atoms in the molecule.