Question

Question: Draw a second resonance structure for each species in parts (a) and (b). Draw two additional resonance structures for the ion in part (c).

a.

b.

c.

Short answer

Answer

a.

b.

c.

Step-by-step solution

Step-by-Step Solution Step 1: Resonance structures

Resonance structures will have few features that are as follows:

• Identical molecular formula
• Equal count of electrons
• Similar atoms

Formation of resonance structures

Resonance structure arises when bond breaking and bond-forming happen. The charges shift, and according to the valency, the atoms are satisfied.

Determination of second resonance structure

a. The double bond between carbon-carbon will be replaced by a single bond, and a positive charge will be formed. The arrow shifts to the other carbon bond so that a double bond is formed.

The formation of the second resonance structure of a

b. The double bond gets replaced by a single bond, and a negative charge is formed to satisfy the valency of carbon. A double bond is formed, and a positive charge is formed on the chlorine atom.

The formation of the second resonance structure of b

c. The carbon-carbon double bond is replaced by a single bond, and a negative charge forms on the carbon atom. Further, the carbon-oxygen (C-O) double bond interrupted with a negative charge on the oxygen atom.

The formation of two resonance structures of c