Question

Question: How many electrons are contained in each molecule?

Short answer

Answer

1. This molecule has $10\mathrm{\pi }$ electrons.
2. This molecule has $7\mathrm{\pi }$ electrons.
3. This molecule has $10\mathrm{\pi }$electrons.
4. This molecule has $14\mathrm{\pi }$ electrons.
5. This molecule has $12\mathrm{\pi }$electrons.

Step-by-step solution

To count the number of π electrons in a molecule

The number of $\mathbf{\pi }$electrons can be calculated by considering the number of double bonds as well as the number of lone pairs in a molecule.

A double bond corresponds to two electrons in a molecule. Always count the number of double bonds and multiply it by two, this will provide the number of $\mathrm{\pi }$ electrons per double bond in a molecule.

The number of π electrons in the given molecules

a. The following molecule has $10\mathrm{\pi }$electrons.

Compound a

b. The following molecule has $7\mathrm{\pi }$ electrons.

Compound b

c. The following molecule has $10\mathrm{\pi }$electrons.

Compound c

d. The following molecule has $14\mathrm{\pi }$ electrons.

Compound d

e. The following molecule has $12\mathrm{\pi }$electrons.

Compound e