Chapter 7, Problem 7.93CP

Interpretation Introduction

Interpretation:

The resonance structure taking into account the curved arrows shown in the original structure has to be drawn. The formal charges have to be assigned and the major contributor to the resonance hybrid has to predicted.

Conceptual Introduction:

• A resonance structure is an alternative form of a molecule with single, double and triple bonds in different positions regarding to the original molecule as a consequence of electron redistribution. The original and resonance structure are not the real structure, an intermediary structure known as hybrid resonance structure is the closest representation of the real structure.
• The formal charge (FC) can be defined in the following way,
$\text{FC=valence electrons-(free electrons + }\frac{1}{2}\text{ bond electrons) }$
• The sum of the formal charge of each atom that forms the molecule or ion must be equal to the charge of said molecule or ion.

To determine:

The resonance structure taking into account the curved arrows shown in the original structure. The formal charges and the major contributor to the resonance hybrid.