Question

According to Huckel's law, which is correct? 

(a) (4n + 2) π electrons 

(b) (4n + 2π) electrons 

(c) (2n + 4) π electrons 

(d) (3n + 3π) electrons

Answer 1

(a) (4n + 2)π electrons

Explanation:
- Huckel's rule provides a method to determine whether a planar, cyclic molecule will have aromatic (extra stability) or antiaromatic (extra instability) properties based on the number of π electrons it possesses.
- The rule states that a planar, cyclic molecule will be aromatic if it has (4n + 2) π electrons, where n is a non-negative integer (including zero). This is known as the "4n + 2" rule.
- Conversely, if a planar, cyclic molecule has (4n)π electrons (where n is an integer), it is antiaromatic, and if it has (4n + 4)π electrons, it is non-aromatic.

Answer 2

(a) (4n + 2) π electrons