Question

Question: Draw additional resonance structures for each species.

Short answer

Answer

a.

b.

c.

Step-by-step solution

Resonance structures

Several structures can be employed to detail bonding in a particular molecule, and such structures are resonance structures. Another name that is employed to denote resonance structures is canonical structures.

Cyclic compounds

Cyclic compounds are compounds where one or several atoms are connected like a ring. There are several cyclic compounds, and some of them include cyclopropane and cyclohexane.

Additional resonance structures for each species

a. The additional resonance structures of cyclopropenyl radical can be given as:

Additional resonance structure of cyclopropenyl radical

b. The additional resonance structures of pyrrole can be given as:

Additional resonance structures of pyrrole

c. The additional resonance structures of phenanthrene can be given as:

Additional resonance structures of phenanthrene