Chapter 8, Problem 4P

Interpretation Introduction

Interpretation:

The resonance contributors for the given species has to be drawn and the structures has to be ranked in the order of decreasing contribution to the hybrid

Concept Introduction:

Resonance contributors:

The localized electron with approximate structure is known as resonance contributors or resonance structure and the actual structure with delocalized electrons is known as resonance hybrid.

Rules for drawing resonance contributors:

1. 1. Atoms never move but electrons move.
2. 2. Only $\text{π}\text{electrons}$ and lone pairs can move not $\text{σ}\text{bonds}$
3. 3. The total number of electrons in the molecule does not change.

The predicated stability of a resonance contributor as follows:

1. 1. An atom with an incomplete octet.
2. 2. A negative charge that is not on the most electronegative atom or a positive charge that is on an electronegative atom.
3. 3. Charge separation.