Huckelszabály
Huckelszabály, also known as Huckel's Rule, is a fundamental principle in organic chemistry used to predict whether a planar cyclic molecule will be aromatic. Aromaticity confers significant stability to molecules. The rule states that a cyclic, planar molecule with a delocalized system of pi electrons is aromatic if it contains (4n+2) pi electrons, where n is a positive integer (0, 1, 2, ...). This means that aromatic systems will have 2, 6, 10, 14, etc., pi electrons.
For a molecule to be considered aromatic according to Huckelszabály, it must satisfy several criteria. Firstly,
Benzene, with its six pi electrons (n=1), is the classic example of an aromatic compound obeying Huckelszabály.