Chapter 1, Problem 1.29P

Interpretation Introduction

(a)

Interpretation:

For the given ion, all the resonance structures are to be drawn.

Concept introduction:

If a molecule or ion has one of the following features, another resonance structure will exist:

1. A lone pair on an atom adjacent to a multiple bond
2. An atom with incomplete octet next to a multiple bond or next to an atom with one or more lone pairs.
3. Alternating double/triple and single bonds.

The movement of an electron pair is shown with a curved arrow, starting at the pair and ending on the atom or region where it moves. The movement must be from a relatively electron rich atom or region to a relatively electron deficient atom or region.

Interpretation Introduction

(b)

Interpretation:

For the given ion, all the resonance structures are to be drawn.

Concept introduction:

If a molecule or ion has one of the following features, another resonance structure will exist:

1. A lone pair on an atom adjacent to a multiple bond
2. An atom with incomplete octet next to a multiple bond or next to an atom with one or more lone pairs.
3. Alternating double/triple and single bonds.

The movement of an electron pair is shown with a curved arrow starting at the pair and ending on the atom or region where it moves. The movement must be from a relatively electron rich atom or region to a relatively electron deficient atom or region.

Interpretation Introduction

(c)

Interpretation:

For the given ion, all the resonance structures are to be drawn.

Concept introduction:

If a molecule or ion has one of the following features, another resonance structure will exist:

1. A lone pair on an atom adjacent to a multiple bond
2. An atom with incomplete octet next to a multiple bond or next to an atom with one or more lone pairs.
3. Alternating double/triple and single bonds.

The movement of an electron pair is shown with a curved arrow starting at the pair and ending on the atom or region where it moves. The movement must be from a relatively electron rich atom or region to a relatively electron deficient atom or region.