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Introduction to Aromatic Compounds

An aromatic c...

Question

An aromatic compounds among other things should have a $(4 n + 2)$ $π -$ electron cloud, where $n$ can't be:

A

\frac{1}{2}

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B

3

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C

2

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D

1

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Solution

The correct option is A $\frac{1}{2}$
For any system to be aromatic, it must be planar, cyclic, contain conjugated $π$ electrons and it must follow Huckel's rule. According to Huckel's rule, if a cyclic, planar, conjugated molecule has $(4 n + 2) π$ electrons, it is aromatic.
where $n$ can only be positive integer $i . e . 0, 1, 2, 3...$ , it cannot be fractional or negative.

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