Q 26 E - Organic Chemistry (Mcmurry)

Question

Question: Use the curved arrow formalism to show how the electrons flow in the resonance form on the left to give the one on the right.

a)

b)

c)

Step-by-Step Solution

Answer

a) 

b)

c)

Step 1: Resonance definition

Resonance is nothing but the delocalization of electrons within a molecule.

There are certain rules to draw the resonating structure:

1. In a resonating structure, only electrons are move while the position of atoms remains the same.

2. Only pi electrons and lone pair of electrons move.

Step 2: Resonance of compound (a)

In the following resonating structure lone pair of electrons on nitrogen is delocalize which results in the formation following structure;

Step 3: Resonance definition

Resonance is nothing but the delocalization of electrons within a molecule.

There are certain rules to draw the resonating structure:

1. In a resonating structure, only electrons move while the position of atoms remains the same.

2. Only pi electrons and lone pair of electrons move.

Step 4: Resonance of compound (b)

In the following resonating structure lone pair of electrons on oxygen is delocalized, which results in the formation following structure;

Step 5: Resonance definition

Resonance is nothing but the delocalization of electrons within a molecule.

There are certain rules to draw the resonating structure:

1. In a resonating structure, only electrons move while the position of atoms remains the same.

2. Only pi electrons and lone pair of electrons move.

Step 6: Resonance of compound (c)

In the following resonating structure of benzene, $\mathrm{\pi }$ electrons are delocalized, which results in the formation following structure;