Question

In Huckel's (4n + 2) $\pi e^{-}$ rule for aromaticity, 'n' represents?

• A. Number of carbon atoms
• B. Number of rings
• C. Whole number
• D. Fractional number (or) integer (or) zero

Answer 1

The correct option is C Whole number

(4n + 2) rule is given by Huckel for checking the aromaticity of the given compounds. For a compound to be aromatic it should have (4n+2) $\pi$ $e^{-}$. The value of n can be a whole number i.e., n = 0, 1, 2, 3....
If a compound obey the 4n+2 rule it can be a aromatic compound.