Question

Write Huckel's rule below and determine how many electrons are required to make an aromatic ring with n = 0, 1, and 2.

Answer 1

Answer: The number of electrons for n = 0, 1 and 2 are 2, 6 and 10 respectively.

Step-by-step explanation:

Huckel's rule is used to determine the aromaticity in a compound. The number of delocalized
`\pi-` electrons are calculated by using the equation:

`\text{Number of delocalized }\pi-\text{ electrons}=4n+2`

where,

n = 0 or any whole number

• Calculating the value of electrons for n = 0

Putting values in above equation, we get:

`\text{Number of delocalized }\pi-\text{ electrons}=4(0)+2=2`

• Calculating the value of electrons for n = 1

Putting values in above equation, we get:

`\text{Number of delocalized }\pi-\text{ electrons}=4(1)+2=6`

• Calculating the value of electrons for n = 2

Putting values in above equation, we get:

`\text{Number of delocalized }\pi-\text{ electrons}=4(2)+2=10`

Hence, the number of electrons for n = 0, 1 and 2 are 2, 6 and 10 respectively.